You will need:
1. Print the picture shown or make your own on paper.
2. Glue the picture on some cardboard and allow to dry.
3. Pierce the middle of the disc with a nail.
4. Insert the pencil through the whole and spin the disc.
5. Do you see any colours on the disk?
6. Slow the disk to 3 - 5 rotations/sec and dim the light.
Benham's disc example that you can make yourself