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Touch Boards
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Use this activity (13th activity on the page) to introduce learners to the sense of touch. Learners collect objects of varying textures like feathers, rocks, sand, etc.

Spinning Illusions
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In this activity, learners construct three optical illusion toys to examine how our brains play tricks on what we see.

Benham's Disk
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In this activity, learners make a Benham Top to explore visual illusions and optics.

Thaumatrope
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In this activity, learners make an optical illusion toy from the 1800s to explore persistence of vision.