Last year, Helen, Haley & I (we call ourselves the Technology LLC when we're trying to sound official) volunteered at the local elementary school with SWE. They worked with the entire 4th grade class. After dividing children into groups of 4-6, each one recieved some flavor of an Agilent educational kit. For simplicity, we only used three kinds: a solar-powered car, an electronic matching game, and ... something else. It's not important.