The cleanest energy sources you could find on earth</br>An amazing environmental science kit</br>A unique experimental kit that inspires young scientists</br>Watch your child's delight and sense of accomplishment with the clock they create</br>Turn the kids onto the notion of leaving a smaller carbon footprint</br></br>Product Description</br></br>Use natural materials like a potato?? salt water?? even mud to power a light or sound a buzzer! A great environmental science activity kit. Enviro Battery Kit Includes wires?? zinc and copper plates?? LED lamp?? buzzer chip?? plastic cups for amplification?? experiment guide and detailed instructions. Potatoes are a good source of potassium?? but they can also power an alarm clock! Potato Clock kit contains a digital clock and all the parts needed to run it?? expect you provide the spuds. Full instructions included.</br><br/>http://www.amazon.com/gp/product/B00TJAE2BA