CKR-144 - FUEL CELL ENGINE CAR KIT SALT WATERThe kit demonstrates clean energy and the concept of an environmentally friendly fuel cell engine car. 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 engine car 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