Physics
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VEX Robotics Catapult By HEXBUG
Build the Catapult from over 100 VEX robotics pieces! [more info...]
$22.99
WindBots: 6-in-1 Wind-Powered Machine Kit
Harness the power of wind to build machines that move! From Thames & Kosmos, for ages 8-12 yrs. [more info...]
$29.99