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In this activity, learners create a simple “top” from a CD, marble and bottle cap, and use it as a spinning platform for a variety of illusion-generating patterns.

In this activity, learners estimate risks associated with different events and compare their estimates to the real possibilities.

This mirror-tracing activity related to proprioception is a visual and motor test that involves learning a new motor skill.

In this activity, learners use a simple trick of perspective to dress friends in tiny cutout clothing. Learners make tiny pants out of card stock and tape them to the end of a stick.

In this activity about light and perception, learners create and observe moire patterns.

In this lab (Activity #1 on page), learners explore how we see color.

In this artistic activity, learners blow up a smaller picture into a larger one, by using a grid.