Pro’sKit GE-730 3-in-1 Spiral Spring Science Kit – Battery-Free STEM Robot, Race Car & Timer DIY Build Set for Kids 8+ 12+ MALC ™ Triple Color Laser

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Pro’sKit GE-730 3-in-1 Spiral Spring Science Kit – Battery-Free STEM Robot, Race Car & Timer DIY Build Set for Kids 8+ 12+ MALC ™ Triple Color LaserLet young inventors discover real mechanical physics through hands on play with the ProsKit 3 in 1 Spiral Spring Science Kit GE 730. This exciting battery free STEM engineering kit allows kids to build three spring powered creations: a motorized style walking robot, a fast spiral spring race car, and a countdown clock timer all driven only by kinetic spring force. Instead of using motors or batteries, children wind the spring to store energy, then