The most unique and non polluting energy source you can find on earth- the potato, salt water and mud.

Be amazed at how they light up a bulb or sound buzzer.

Includes experiment guide for making a coin battery, fork battery, potato buzz wiregame, and more.

Caution: High voltage inspiration!

Contains 3 zinc plates, 3 copper pates, connection wires, 3 plastic cups, a light tower, a LED lamp with connection wire, a sound chip with connection wire, an experiment record sheet, adhesive tape and detailed instructio