{ "item_title" : "Geared-Up Gadgets", "item_author" : [" Thames & Kosmos "], "item_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. ", "item_img_path" : "https://covers2.booksamillion.com/covers/bam/0/81/474/301/0814743013421_b.jpg", "price_data" : { "retail_price" : "21.95", "online_price" : "21.95", "our_price" : "21.95", "club_price" : "21.95", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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