Delivery Time: On Stock
Brand: 4M
Shipping Cost NL: 3.00 Euro
Shipping Cost BE: 3.00 Euro

13.99€ 11.89€

The most unique non polluting energy sources you can find on Earth - the potato, salt water and mud. Be amazed at how they light up a bulb or a sound buzzer.


  • 3 zinc plates,
  • 3 coppers plates,
  • a potato buzz wire game,
  • a light tower,
  • a LED lamp with connection wires,
  • 3 plastic cups,
  • a sound chip with connection wire,
  • an experimental record sheet,
  • adhesive tape
  • detailed instructions.
Enviro Battery