A dark blue box with a photo of the "perpetual motion" machine contained within

Smithsonian "Perpetual Motion" Machine

SKU:
S154062
$31.95
Width:
10.50 (in)
Height:
12.00 (in)
Depth:
2.00 (in)
Current Stock:
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Description
Explore the balance of potential and kinetic energy with this scientific model that uses magnetism to keep the weighted spheres in motion. Requires 4 AA batteries (not included). Ages 8 and up.