This portable sized science experiment is big fun in a small package. Lemon Clock small science kit is a unique party favor for your next kids birthday party and an engaging kitchen science experiment. This mini science lab kit from Educational Toys Planet allows children to discover the science of batteries by powering a clock with regular lemon. Simply add your own lemon to turn the Lemon Clock Science Party Favor by 4M into an amazing lemon powered clock. Lemon is not included in this educational kids party favor. The Lemon Clock Science Party Favor is fun to play and learn with!