The method of making greeting cards is simple.

I think the way to make greeting cards is as follows:

Prepare colored paper, glue, scissors and pens. Draw the cross section of the hot air balloon first, cut out seven and paste them in turn. Stick and write a greeting on the yellow cardboard. Draw the shape of the balloon basket and write the words, cut it out and stick it on the cardboard. Finally, connect the balloon with the basket with a pen and write "Happy Teacher's Day" to complete the greeting card.