Thames & Kosmos Mechanical Engineering: Machines & Vehicles STEM Experiment Kit | Build 20 Mechanical Models, Explore Physics Of Force & Motion |

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Thames & Kosmos Roller Coaster Engineering STEM Kit | Design, Build, Experiment W/ Working Roller Coaster Models | Explore Physics, Forces, Motion,

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Thames & Kosmos Solarbots: 8-In-1 Solar Robot STEM Experiment Kit | Build 8 Cool Solar-Powered Robots In Minutes | No Batteries Required | Learn About