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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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Create an instrument that you don't play--you just listen to it through tubes of various lengths.

1 cent - $1 per student Ages 4 - 14 5 to 10 minutes
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Build a house you can fit inside, using cardboard tubes.

1 cent - $1 per group Ages 6 - 14 45 to 60 minutes