The US Department of Energy and the National Science Teachers Association have team up on a program designed to engage students in energy issues. Along the way, the children get to serve as citizen scientists and possibly earn their school money.
America's Home Energy Education Challenge is for children in grades 3-8. Some of the ways to participate include the collection, analysis, and sharing of home energy use data, the creation of energy use savings plans, and entering a poster contest. The choice of participation option is up to each individual class.
For more information, start here.