This engine can be easily disassembled and reassembled by your budding mechanic. Turn the crank to watch the pistons pump. Hear the engine rev up and watch the light glow. Lights and sound. Battery Operated. Did someone say that it's tool time? The Workman Light and Sound Engine Overhaul Toy Set will have your child feeling like a real mechanic. With an abundance of tools to play with, this kit will keep them busy while helping them build their cognitive skills. The kids' engine toy builder set is made especially for children ages 3 and up. It even makes sounds and lights up for an added touch that little ones are certain to enjoy. Gender: unisex.