This electronics project is designed to introduce children to the concept of alternative energy sources. Focusing on solar power, it provides a fun insight in to how we may harness the power of the sun as a source of energy for years to come. For indoor use, the speed boat can be powered via 2 x AA batteries and the instructions provide clear instructions for both solar and battery power sources. Please note that the solar panel and the battery box can not be connected at the same time, as this will cause damage to the solar panel.