Tools/materials: orange and silver flash cardboard, a pair of scissors. Paper cutter, dark paper. A glue stick and a ruler. A piece of white paper and some colored pens. Methods/steps:

1. Prepare the materials needed by hand, cut the flash cardboard into strips, and cut the dark paper into two pieces of the same size.

2. Stagger the colors of orange and silver flash cards and stick them on a piece of Zhang Shen paper alternately with glue sticks.

3. Draw a dancing girl on white paper with colored pen.

4. After painting the color, cut it with scissors.

5. Put the girl on the glued shiny cardboard.

6. Compare another piece of dark paper with a ruler and cut out four borders with a paper cutter.

7. Stick the reverse side of the border with a glue stick.

8. Place the border on the flash card, align the edge and paste it. The flash card is ready. As long as you do it manually, the color in the middle flashes. Isn't it interesting?