How to make a storage box by hand?

Step 1: First, find two cartons, one hard and the other soft, as shown below:

Step 2: Measure the length with a ruler, and then draw a line with a pencil, as shown in the following figure:

Step 3: Cut along the line with scissors and cut into two rectangular pieces of paper at a certain speed, as shown in the following figure:

Step 4: Put the box like this, as shown in the following figure:

Step 5, then put many square pieces of paper on the box for separation, as shown in the following figure:

Step 6, slowly paste the grid inside with transparent wide tape, as shown in the following figure: