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We listen to stereo music systems, tv's, and radios because it simulates being where the sound originates.

free Ages 4 - 14 Under 5 minutes
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Known as the waterfall effect, this activity demonstrates adaptation in our visual system.

free Ages 6 - 14 Under 5 minutes
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We don't normally view people upside down and so our brains aren't accustomed to it.

free Ages 4 - 18 Under 5 minutes