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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 construct three optical illusion toys to examine how our brains play tricks on what we see.

This activity is designed to let learners measure their reaction time or response time to something they see.

During this activity, learners take part in a variety of tasks which involve moving and balancing different body parts.