4M Lemon Powered Clock Discover the science of batteries by building a lemon-powered clock. Made using safe and high quality materials, just add a lemon for a fun lesson in battery science. Included in the package are copper and zinc plates, wire, and a clock. The required lemon is not included. This clock is recommended for ages 5 and up. Challenge your child's imagination with 4M toys and kits. 4M educational toys cover a wide range of educational subjects and include science kits, arts and crafts kits, robotics kits, and more. 4M offers a wide range of toys and kits to let you build a clock, crochet a placemat, or turn your room into a planetarium--all in the name of making learning fun. Build a lemon powered clock Discover the science of batteries Includes copper and zinc plates, wire and a clock Lemon required, not included For ages 5 and up