If you are going to buy toys for your little nippers anyway, wouldn’t it be nice not to have to worry about batteries? The UK based Ecotronic has developed a linethat you shake or wind up to create its own energy by dynamo technology. The company has a myriad of products, including eco flashlights, microphone, a robot, radios and a rocket. The toys range in price from $9.99 to $29.99 at International Playthings.