Materials and tools: ruler, pencil, colored paper, meat cutter, scissors, black pen, red pen and double-sided tape.

1. Mark the size of the pencil box with a pencil and cut it open with scissors.

2. Draw a crease on the marked fold line with a meat cutter and a ruler, cut it with scissors, and fix the box with double-sided tape.

3. Measure the length of 16*24.4cm on the cardboard with a ruler, mark it with a pencil, cut it off with scissors, carve paper marks with a carving knife and fold it into a three-dimensional rectangle.

4. Put the small yellow box into the small green box, cut a small piece and stick it on the small yellow box. Finally, decorate the pencil case, and a pencil case is ready.

5. Draw another cute bear, and the beautiful pencil case will be finished.

For children, origami games have many benefits. Origami can exercise the flexibility of children's fingers and develop their hands-on ability and innovation ability; Things in life, small animals, vehicles, etc. Become an image origami. In this process, children's spatial imagination will also be improved.

For the elderly, origami games can not only help them use their brains, activate their thinking, and achieve the overall coordination of the trinity of hands, eyes and brain, but also prevent the memory of the elderly from declining. Some sanatoriums use origami as a treatment for patients' rehabilitation.

The "origami mathematics" derived from origami art is proved by equations: theoretically, any geometric form can be simulated by origami. With the help of computer software aided design, today's origami researchers can fold more complicated graphics than before.