{"product_id":"geared-up-gadgets-0814743013421","title":"Geared-Up Gadgets","description":"Build five fun gadgets and learn about gears and transmissions. Create a helicopter model with a rotor that spins using a rubber band-powered motor. Assemble a spinner toy that you wind up to launch a fast-spinning top. Make a centripetal force machine that flings its arms outward at high speeds. Build a hand-mixer that demonstrates a gear train. Construct a cool aircraft launcher that flings a model vehicle across the room on a zipline. A 28-page manual guides your model building and experiments with step-by-step illustrated instructions.\u003cbr\u003e","brand":"Thames \u0026 Kosmos","offers":[{"title":"Default Title","offer_id":50523351843090,"sku":"0814743013421","price":18.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0831\/4771\/8930\/files\/img_d1914e2a-3b1f-40d5-8d0c-a4b0d93a848d.jpg?v=1731145714","url":"https:\/\/surprise-castle.myshopify.com\/products\/geared-up-gadgets-0814743013421","provider":"Surprise Castle","version":"1.0","type":"link"}