{"product_id":"mechanical-marble-run-wooden-puzzle-stem-building-kit-for-adults-teens","title":"Mechanical Marble Run Wooden Puzzle – STEM Building Kit for Adults \u0026 Teens","description":"\u003cp\u003eSpiral Tower is a compact masterpiece of mechanical design. A motor-driven paddle lift carries marbles up the tower while a helical chute delivers them back to the base, a continuous loop that runs as long as you let it.\u003c\/p\u003e\n\u003cp\u003eBuilt from 201 laser-cut wooden pieces, the tower assembles without glue using precision-fit joinery. Every gear, every axle, every chute is part of the motion. There is no decoration here, only function. 4 to 5 hours of screen-free flow state, challenging enough to feel earned and quick enough to finish in a single sitting.\u003c\/p\u003e\n\u003cp\u003eThe motor and battery case are in the box. Batteries are not included.\u003c\/p\u003e","brand":"inshopcart","offers":[{"title":"Default Title","offer_id":44123022786638,"sku":null,"price":67.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0687\/6974\/2926\/files\/spiral-slide-1-hero-text.jpg?v=1785909213","url":"https:\/\/inshopcart.com\/products\/mechanical-marble-run-wooden-puzzle-stem-building-kit-for-adults-teens","provider":"Inshopcart","version":"1.0","type":"link"}