... batteries generate electricity Green science Generate electricity Power the clock using patatoeSScience educational kit Science kit Vegetable fruit toys ... energy, try more things to create unusual battery.Provide: Digital clock, test cup, links, Scotch tape, copper, zinc and ... Detail: Item No.:WW10006015 Description:Educational Science Toy Potato Clock Item Size(CM): Packing Style:Color BoxInner Qty:36 ...