Optical Illusions

Sixth graders were introduced to various forms of op art.  They then created their own version by intersecting 6 lines through a mid point.  They then alternated drawing concave and convex lines, this creates the movement.  They were to finish it by using complimentary color pairs.
Materials: Op Art examples, 9x12 white construction, ruler, pencil, markers
Vocab: Convex, Concave, Illusion, Complementary Colors