Discover the science of batteries by building a lemon-powered clock.</br>Made using safe and high quality materials?? just add a lemon for a fun lesson in battery science.</br>Included in the package are copper and zinc plates?? wire?? and a clock.</br>The required lemon is not included.</br>This clock is recommended for ages 5 and up.</br>Challenge your child's imagination with 4M toys and kits.</br>4M