Simple ideas, gizmos and small productions

Preparation materials: an empty beverage bottle, two foam fruit nets, a rubber band and a glass ball.

Production process:

1. Take an empty 250ml beverage bottle and cut off the upper part of the bottle body;

2. Divide the cut part into 8 parts, cut it to the bottleneck with scissors, and then cut each part into a petal shape with the same size;

3. Cover the foam fruit net outside the bottle and fix it at the mouth of the bottle with a rubber band;

4. Wrap a glass marble with another foam fruit net and plug it into the bottle mouth until it is exposed about1cm;

5. Cut off half a table tennis ball, cover the bottom of the hemisphere on the bottle mouth, cut the four sides into whiskers, cover the bottle mouth and fix it with rubber bands.

6. After beautification, a homemade badminton is finished. Hit a dozen with a badminton racket and see how it works.

2, homemade soap paper

Production materials and tools:

White paper with good water absorption, small pieces of soap, writing brush and disposable beverage cans.

Production method:

Chop up the soap first, put it in a jar, put a proper amount of water in it, heat the cup on the stove, and when the soap melts, cut the white paper into the size of a matchbox, coat it with soap one by one, then take it out and dry it in the shade, and you can make soap paper.

3. homemade hot air balloon

1. First, we cut 6-8 leaflike pieces of paper from soft paper.

2. Fold them in half and stick the edges together to make a balloon.

3. Stick the four connecting wires to the bottom of the balloon with adhesive tape. Fix the other end of the line on the table with plasticine.

Try to set the speed of the hair dryer very slowly. Aim the air outlet upward at the opening at the bottom, and then turn on the switch. The balloon will gradually get bigger, tighten the line and leave the table.

4, homemade flashlight

The specific manufacturing method is: lift one end of an abandoned can (such as Lulu beverage can) and beat the other end with a round hammer. Roll up two 1 batteries with thick corrugated cardboard and put them in a can, with the positive pole facing up and the negative pole facing down. Find a suitable plastic cover (for example, the magic big roll cover can just be buckled on Lulu's beverage can), and dig a round hole in the center of the cover, the size of which is suitable for the light bulb to be inserted tightly. Insert the bulb base into the small hole. Take a section of tracing wire, peel off the wire skin at both ends, wrap one end around the lamp cap, and tie a small hole at the other end from the side of the plastic cover. Put the plastic cover on the jar. Check whether the bulb and battery are in close contact. Disposable flashlights will be ready here. When in use, press the wire on the side wall with your thumb on the unpainted weld away from the can, and the flashlight will glow. When your thumb jumps off the wire, the flashlight will go out, which is very convenient to use.

5, homemade solar cookers

Find a concave reflective bowl on a big flashlight, and cut it into a cylinder about 4 cm long with rigid foam plastic or wood, just enough in diameter to fit into the round hole of the reflective bowl. Drill a fine hole horizontally at one end of the cylinder, insert an iron wire with a diameter equivalent to the aperture, and then bend the two ends of the iron wire exposed outside the cylinder at 90 degrees, leaving 5 cm each. Insert the cylinder into the round hole of the reflective bowl, and then insert both ends of the iron wire on the foam plastic or wooden bottom plate. Sharpen both ends of a thin bamboo stick, insert one end into the cylinder in the center of the reflective bowl, and insert a small piece of potato at the other end. Put the device in the sun, let the reflective bowl face the sun, and then, patiently adjust the length of the bamboo stick so that the inserted potatoes are just in the focus of light. Before long, the potatoes will be cooked by the sun and smell delicious.

6, homemade colored candles

Materials: colored crayons, wax

Production method:

1. Find an abandoned canned beverage barrel (for example, 1.25 liter coke bottle), cut off the lid and cut the wax into the barrel.

2. Put the bucket in hot water, stir the wax inside and let it melt completely. It is best to use boiled water. But ask your parents for help, or do this step under their supervision.

3. Pour the molten liquid into a beautiful container (for example, put a heart-shaped chocolate box). Don't pour too much. As for the reason, look down. Of course, you have to put the thread as a candle core in the container first.

4. The initial idea of wax cooling, A, according to the method of surface painting, poured molten colored crayons into it (colored crayons come in handy at this time). In this way, different colors of wax are added layer by layer, and beautiful candles are made.

7. Self-made wall-mounted flower basket

Materials and tools: two sprite bottles, glue, meat cleaver, scissors.

Production method:

1. Remove the green bottom cover of Sprite bottle, cut it into lotus shape, turn it over and stick it on the bottle body to form the base.

2. Cut a 2 cm wide green ring from the green bottom sleeve and put it on the bottle.

3. Remove the bottleneck, and cut a 13cm long, 8cm wide wideband and several 3cm wide narrowband on the bottle.

4. Carve a pattern on a 3 cm narrow strip with a meat cleaver? As shown in figure 3, then fold these narrow strips outward and insert the green ring from bottom to top.

5. Take another beverage bottle, use the bottle body and cut out 6 leaves with scissors, the length is 17 cm.

6. Nail the flower basket on the wall, insert leaves and flowers, and the wall-hung flower basket will be ready.

8, homemade cockroach catching box

Take a piece of 220× 150(mm) cardboard.

The most important part of the capture box is the capture surface. Take a piece of plastic film, cut it into the same size as the bottom of the box, coat it with adhesive and spread it on the bottom of the box. Whether you can catch cockroaches depends on the adhesive. The adhesive has two functions: one is to introduce the cockroach into the box, and the other is to firmly stick the cockroach to the catching surface. Preparation of attractant: Mix 40% meat powder, 50% flour and 10% bean cake, with a total amount of about 20g, and mix well for later use. The adhesive is prepared by mixing 20g of rosin and10g of vegetable oil, heating to gel, and uniformly mixing attractant and adhesive.

Spread the prepared paste evenly on the grasping surface lined with plastic film, then fold it inward according to the original dotted line, and finally insert the tongue piece B into the notch A..

Because the mixture of rosin and vegetable oil is not dry, the viscosity of bait can be as long as one week. Put the trap box in the place where cockroaches haunt. Because the box is dark and has the bait that cockroaches like, cockroaches will climb into the box to fight for the bait and get stuck on it. When it is full, the carton can be crushed and discarded, and the plastic film can be removed and replaced with plastic film coated with bait, so that the box can be reused.

If the size of the catching box is enlarged and the composition of the adhesive is slightly adjusted, the paper mousetrap can be made by thickening the coating.

References:

Baidu (the world's largest Chinese search engine)

1. Walnut boat

Materials: walnuts, matchsticks, plasticine and small cloth.

Production method:

1, put the pointed walnut on the fire for a while, then throw it into cold water, and the walnut will crack along the seam.

2. Divide the walnut in half along the seam.

3. Dig out the walnut kernel, leave an empty shell and stick a small piece of plasticine in the shell.

4. Make a sail with matches and a small piece of cloth that says "Dream" and insert it in plasticine. In this way, a "walnut boat" carrying dreams can set sail.

Make your own flashlight

The specific manufacturing method is as follows:

Remove a lid from a waste can (such as Lulu beverage can) and hit the concave surface with a round hammer at the other end. Roll up two 1 batteries with thick corrugated cardboard and put them in a can, with the positive pole facing up and the negative pole facing down. Find a suitable plastic cover (for example, the magic big roll cover can just be buckled on Lulu's beverage can), and dig a round hole in the center of the cover, the size of which is suitable for the light bulb to be inserted tightly. Insert the bulb base into the small hole. Take a section of tracing wire, peel off the wire skin at both ends, wrap one end around the lamp cap, and tie a small hole at the other end from the side of the plastic cover. Put the plastic cover on the jar. Check whether the bulb and battery are in close contact. Disposable flashlights will be ready here. When in use, press the wire on the side wall with your thumb on the unpainted weld away from the can, and the flashlight will glow. When your thumb jumps off the wire, the flashlight will go out, which is very convenient to use.

3. Self-made wall-mounted flower basket

(1). Materials

Hard plastic pipe with uniform thickness, 3 cm in diameter and 40 cm in length; A soft wooden stick the thickness of a plastic pipe and 5 cm long; Two corks; Two thin sheets of iron; Sewing needle

(2). Making tools

Hacksaw, scissors, awl and knife.

(3) manufacturing steps

① Cut the plastic pipe from the middle, divide it into two sections with equal length, and drill a small hole at the top and bottom of each section. Then connect the two pipes with a 5 cm long soft wooden stick and pass a sewing needle through the soft wooden stick.

(2) using a thin iron sheet to cut into two brackets and two figures, and fixing the figures on both sides of the plastic pipe,

(3) Fill the pipe with water and plug it with a cork, put the sewing needle on the bracket and adjust the balance of the pipe on the bracket. At this time, water flows out rhythmically from the small hole under the tube. Middle school students' science and technology network

At this time, as long as one end of the seesaw is pressed, the seesaw will automatically tilt upward and fall, and the water on both sides will drop out in turn until all the water drops out. Attention, please put it in the basin to prevent the water from wetting the table. Think about why it goes up and down automatically.

References:

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There are many old electronic newspapers bought in second-hand bookstores.

I have an experimental tool to detonate a bomb, an igniter of an electronic lighter (the kind that sparks when you click it), a lighter and a film box.

Extend the electric outlet end of the igniter of the electronic lighter, then wrap the copper cap at the tail with thin copper wire and stick the two wires in the capsule. The distance between the two wires is about1mm.

Aim the film box of the camera at the lighter to inject the gas in the lighter, immediately cover the lid tightly, and press the igniter, and the film box will detonate.

Pay attention. Pay attention. Keep people away.

4. Homemade soap paper

In life, hands are most susceptible to bacterial infection, so it is necessary to develop a good habit of washing hands. Let's make soap paper easy to carry and use.

Materials and tools: white paper with good hygroscopicity, small pieces of soap, brushes and disposable beverage cans.

Production method:

Chop up the soap first, put it in a jar, put a proper amount of water in it, heat the cup on the stove, and when the soap melts, cut the white paper into the size of a matchbox, coat it with soap one by one, then take it out and dry it in the shade, and you can make soap paper.

When you want to wash your hands, first wet your hands with water, then gently rub them with the prepared soap paper to generate foam and remove dirt, and finally rinse them with water.

Make a rabbit box

1. Take a plastic bottle (beverage bottle, etc. ) and draw a rabbit outline at the bottom (as shown).

2. Then cut along the line.

3. Cut out the rabbit's eyes, nose and beard with colored paper and stick them on the bottle with glue to form a rabbit container.

Let the children put their gadgets in and cultivate the habit of doing things in an orderly way.

Tips: It must be done with the help of parents!

Make a small balance

Tips: It must be done with the help of parents!

1. First cut the plywood into four pieces: A, B, C and D.

2. The bottom opening of B is the middle opening of C and D..

3. Insert three thin strips as shown in the figure.

4. Nail A to the middle and upper section of B, but be careful not to nail it to death, and be able to move freely.

5. Cut the crescent-shaped target board with plywood and mark it with scales.

6. Cut a small piece and fix it on A with universal material test glue, as shown in the figure.

7. Cut two disks of equal size.

8. Make four holes at the top.

9. cut a small ditch on each side of a.

10. Tie the chip with a thin thread, and the balance will be done.

Next, you can use your imagination to decorate the small balance and use it as a gadget after the experiment. It's killing two birds with one stone!

7. Little tortoise with walnut shell

I. Production materials and tools

Scissors, calendar paper, glue, crayons, walnuts, etc.

Second, the production method

1. Carefully split the walnut from the middle, divide it into two halves, and take the whole half (Figure 1).

2. Take old calendar paper (or other thick white paper) and cut the glans, feet, tail and body according to Figure 2. The body should be just big enough to fit into the walnut shell.

3. Fold the head in half according to the dotted line and stick it firmly with glue (as shown in Figure 3).

Stick the walnut shell on your body, and then draw eyes on your head, and a lifelike little turtle will be made.

8. Clean the eraser with a brush

If you make a mistake, use an eraser. After wiping, there will always be a lot of debris left on the paper. It is unsanitary and troublesome to pat by hand or blow by mouth. It won't be so troublesome to make a clean eraser.

Material: large rubber, waste brush.

Tools: scissors, glue.

Production method:

1. Dig a small and shallow round hole at one end of the rubber. 2. Remove the tip of the waste brush, clean it and dry it.

3. Cut off the tip of the brush head to make it a small brush.

4. Insert the brush head into the small round hole of rubber and stick it firmly with glue.

Ok, the clean eraser is ready. Whenever you finish wiping the eraser, you can gently "sweep" the crumbs off the paper with a brush and then pour them into the wastebasket.

9. Self-made wall-mounted flower basket

Materials and tools: two sprite bottles, glue, meat cleaver, scissors.

Production method:

1. Remove the green bottom cover of Sprite bottle, cut it into lotus shape, turn it over and stick it on the bottle body to form the base.

2. Cut a 2 cm wide green ring from the green bottom sleeve and put it on the bottle.

3. Remove the bottleneck, and cut a 13cm long, 8cm wide wideband and several 3cm wide narrowband on the bottle.

4. Carve a pattern on a 3 cm narrow strip with a meat cleaver? As shown in figure 3, then fold these narrow strips outward and insert the green ring from bottom to top.

5. Take another beverage bottle, use the bottle body and cut out 6 leaves with scissors, the length is 17 cm.

6. Nail the flower basket on the wall, insert leaves and flowers, and the wall-hung flower basket will be ready.

10. Automatic carton

The lid of this carton is usually covered to prevent dirt and dust from entering. When you want to take the paper in the box, just lift the lid. With the lifting of the lid, the paper in the box will be lifted automatically, which is very convenient to pick up. After use, once the lid is closed, it will return to its original position. This kind of automatic paper box is most suitable for holding toilet paper. The size of the carton can be designed according to your own needs.

1 1, homemade badminton

Preparation materials: an empty beverage bottle, two foam fruit nets, a rubber band and a glass ball.

Production process:

1. Take an empty 250ml beverage bottle and cut off the upper part of the bottle body;

2. Divide the cut part into 8 parts, cut it to the bottleneck with scissors, and then cut each part into a petal shape with the same size;

3. Cover the foam fruit net outside the bottle and fix it at the mouth of the bottle with a rubber band;

4. Wrap a glass marble with another foam fruit net and plug it into the bottle mouth until it is exposed about1cm;

5. Cut off half a table tennis ball, cover the bottom of the hemisphere on the bottle mouth, cut the four sides into whiskers, cover the bottle mouth and fix it with rubber bands.

6. After beautification, a homemade badminton is finished. Hit a dozen with a badminton racket and see how it works.

12, homemade hot air balloon

1. First, we cut 6-8 leaflike pieces of paper from soft paper.

2. Fold them in half and stick the edges together to make a balloon.

3. Stick the four connecting wires to the bottom of the balloon with adhesive tape. Fix the other end of the line on the table with plasticine.

Try to set the speed of the hair dryer very slowly. Aim the air outlet upward at the opening at the bottom, and then turn on the switch. The balloon will gradually get bigger, tighten the line and leave the table.

13, homemade small rockets can fly at home.

Rocket launching is a very large and complicated project, and the basic principle of its operation is reverse thrust. The experiment of the same scientific principle can also be done at home, that is, everyone can make a small family rocket. In this final, the first player, teacher Song Xiangyang from Anhui, used very simple materials to launch a rocket on the spot.

There are only four kinds of experimental materials on the stage, which are a tin foil paper for cigarette case, a sewing needle, a paper clip and a box of matches. Teacher Song put the sewing needles and matches side by side, then wrapped them in tin foil, wrapped them tightly with the match head, and then pulled out the sewing needles, and the rocket body was completed. He broke the paper clip into a 45-degree angle, made a bracket, and put the "rocket" on the bracket, waiting for launch. But can we take off or not?

Teacher Song struck a match and carefully lit the "rocket" on the bracket. In an instant, the "rocket" slipped through an arc of white smoke in the air and flew more than one meter away. The audience applauded. Although this experiment is simple, Mr. Song has experimented at home for more than 3,000 times to find the most suitable match weight and sewing needle thickness, and calculated many parameters to achieve this effect.

Experimental principle: recoil principle-matches and sewing needles in the "rocket" are arranged side by side. After the sewing needle is pulled out, the remaining channel is the air nozzle. When it is ignited from the outside of the foil paper, the matchhead is heated and burned, and the burned gas is ejected along the air nozzle, forming a recoil force, and the "rocket" is lifted off. Today's jets and rockets use this principle.

14 homemade colored candles

Materials: colored crayons, wax

Production method:

1. Find an abandoned canned beverage barrel (for example, 1.25 liter coke bottle), cut off the lid and cut the wax into the barrel.

2. Put the bucket in hot water, stir the wax inside and let it melt completely. It is best to use boiled water. But ask your parents for help, or do this step under their supervision.

3. Pour the molten liquid into a beautiful container (for example, put a heart-shaped chocolate box). Don't pour too much. As for the reason, look down. Of course, you have to put the thread as a candle core in the container first.

4. The initial idea of wax cooling, A, according to the method of surface painting, poured molten colored crayons into it (colored crayons come in handy at this time). In this way, different colors of wax are added layer by layer, and beautiful candles are made.

15. Hydraulic boat:

Materials: 3 plastic foam boards, cans (chewing gum boxes are also acceptable) and straws (hard).

Production method:

Cut the plastic foam board into the shape of a boat, and put them together. Be sure to seal them! ! ! Take out the cans in the middle two mountains, cut the cans up and down, insert the cans, and then insert the straws.

Fill it with water and you can go.