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We don't normally view people upside down and so our brains aren't accustomed to it.

Known as the waterfall effect, this activity demonstrates adaptation in our visual system.

In this activity, learners create an optical illusion by spinning two attached cups. A round ball seems to magically appear when the cups spin.

Create an illusion where it appears that your hand has a hole in it. You'll see the results from when one eye gets conflicting information.

In this activity, learners surprise their eyes with an optical illusion involving arrows made out of pipe cleaners.