The kit demonstrates clean energy and the concept of an environmentally friendly fuel cell spider. A great chance for children to learn about alternative energy sources. Just add salt water to power it. Once the fuel cell module is activated with the salt water, it can power the spider for about 4 hours continuously. Comes as a kit.

Features:

• Uses magnesium sheets in the fuel cell
• No soldering or batteries required
• 3 magnesium sheets included