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Category Related Items
TR-4172
A popular scientific novelty, this is a boat shaped piece of plastic that you can spin by flicking one end with your fingertip, so it spins clockwise. Then it stops, and spins back on its own, anti clockwise, in a most
$1.00
BK-6117
Tricks, games, puzzles, and experiments that make science fun for the whole family.
$14.95
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