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Science - Physics

Catapults & Crossbows

Regular Price: $27.99
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Simple Machines

Regular Price: $29.99
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Gumball Machine Maker

Regular Price: $39.99
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Regular Price: $33.99
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Regular Price: $64.99
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Regular Price: $35.99
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Ultralight Airplanes

Regular Price: $21.99
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Maxwell's Wheel

Regular Price: $25.99
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Showing items 1-8 of 8.