You can generate enough electricity to run a digital clock by plugging electrodes into common potatoes! An amazing chemical experiment which also works with tomatoes, lemons, apples - even soft drink or beer! All parts (except fruit/veg) supplied including:

• highly accurate digital clock module
• Metal electrodes, wire
• Instructions and fluid beakers
• Perfectly safe for children and highly educational. (Do not eat fruit/veg after using as batteries)
• Recommended for ages: 10+