Buy Robot kits at http://www.sciencestoreforthestars.com/robot-building-kits.aspx – OWI Valiant Viking Ship solar kit, OWI-MSK678, no batteries required and 33 plastic parts to assemble, put it in the water under light and watch it go, easy to follow instructions motivate future scientists to learn about solar energy and challenge young people to be technically precise with miniature parts. Science Store for the Stars sells all OWI Robot kits!
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