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In this indoor or outdoor demonstration, use a large and small ball to illustrate conservation of energy and momentum.

free Ages 4 - adult Under 5 minutes
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Learners observe glow-in-the-dark objects in a homemade light-proof box. Objects can include glow sticks, glow-in-the-dark toys, and toys with fluorescent paint.

$1 - $5 per group Ages 6 - adult Under 5 minutes
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This kinesthetic science demonstration introduces learners to four states of matter: solid, liquid, gas, and plasma.

1 cent - $1 per group Ages 8 - 14 10 to 30 minutes
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In this activity, learners explore how two cylinders that look the same may roll down a ramp at different rates.

$1 - $5 per student Ages 8 - 14 10 to 30 minutes
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In this activity, learners build styrofoam boats powered by twisted rubber bands.

$5 - $10 per student Ages 6 - 18 1 to 2 hours