Alternative Energy, Green energy (energy concept) training kits
Kosmos Solar AutoDescription:Simple and fun installation with 5 models!Renewable energy!5 Model37 Pi..
Kosmos Solar Boat
Construct a solar-electric boat and five additional models using an innovative mo..
Kosmos Power HouseHuman civilization's energy consumption is growing. At the same time, the harmful ..
Kosmos HydropowerA Parent's Choice Recommended Award Winner!Hydropower has been used for hundreds of..