Seeing is believing! Or is it? With this simple experiment, young scientists can explore the concept of visual perception. Attach Benham's disk to a rotating appliance such as a hand drill; As it spins, the black lines appear to be...

Young scholars are challenged to create optical illusions using using cut-outs. The activity provokes thoughtful discussion about scale.

Students examine the relationship between three dimensions and two dimensions by working with shadows of cubes and other models. Students work in groups and use Zome System Creator Kits to try and build a shape other than a cube that...