{"product_id":"diy-assemble-mechanical-marble-run-gear-model-technology-kit-children","title":"DIY Mechanical Marble Run Gear Model Kit — Wooden STEM Assembly Toy for Kids","description":"\u003cp\u003eBuild a working \u003cstrong\u003emechanical marble run powered entirely by gears\u003c\/strong\u003e — no batteries, no electronics, just precision wooden engineering. This DIY assembly kit teaches kids how gear systems transfer motion and energy, delivering a satisfying, hands-on STEM experience from first piece to final run.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGear-Powered Marble Run —\u003c\/strong\u003e Unlike standard marble runs, this one uses an interconnected gear mechanism to move the marble — giving kids a real-world look at how gears, torque, and mechanical motion work together.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull DIY Assembly —\u003c\/strong\u003e Every part starts unassembled, requiring kids to sort, identify, and build the mechanism step by step — developing patience, spatial reasoning, and mechanical intuition.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid Wood Construction —\u003c\/strong\u003e Made from quality wood materials that are safe, durable, and built to last through repeated assembly and display use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo Batteries Required —\u003c\/strong\u003e Runs entirely on mechanical energy — a pure physics demonstration of how gear systems store and transfer motion without any power source.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact Finished Size —\u003c\/strong\u003e Finished model measures approximately 15 x 9.5 x 12 cm — a great desk or shelf display piece once assembled.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTeaches Core STEM Concepts —\u003c\/strong\u003e Covers mechanical engineering, gear ratios, gravity, and kinetic energy in a format that’s engaging, tactile, and genuinely fun to build and watch.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGreat for Ages 8+ —\u003c\/strong\u003e Suitable for independent builds by older kids or as a parent-child project for younger builders — a rewarding challenge at any skill level.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eWood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Source\u003c\/td\u003e\n\u003ctd\u003eNone (mechanical\/gravity)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinished Size\u003c\/td\u003e\n\u003ctd\u003e~15 x 9.5 x 12 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncludes\u003c\/td\u003e\n\u003ctd\u003e1 complete kit set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAssembly\u003c\/td\u003e\n\u003ctd\u003eFull DIY build required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUse Case\u003c\/td\u003e\n\u003ctd\u003eSTEM education, desk display, science fairs, gifts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended Age\u003c\/td\u003e\n\u003ctd\u003e8+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"AliExpress","offers":[{"title":"style1","offer_id":53717292253368,"sku":"STYLE1","price":16.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0937\/3764\/8312\/files\/S501f34505d4c468d9694c3423a3a004fF.webp?v=1783485879","url":"https:\/\/hardassetsecurity.com\/products\/diy-assemble-mechanical-marble-run-gear-model-technology-kit-children","provider":"Hard Asset Security","version":"1.0","type":"link"}