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$24.95
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Magnetic Science$24.95
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Simple Machines$29.95
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$39.95
$29.95
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$49.95
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$29.95
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Physics Workshop$59.95
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Rubber Band Racers$19.95
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$29.95
New Arrivals
$25.95
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Ultralight Airplanes$19.95
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Marble Runs
Marble Run - Essential 70-Piece Set$39.95
$179.95
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