Buy Robot kits at http://www.sciencestoreforthestars.com/robot-building-kits.aspx – OWI Moon Walker 2 comes in soldering and non-soldering models, MV-979, this robot begins to walk when it detects a change in light intensity or sound commands and continues its four legged voyage until instructed by an internal timer to stop, the combined technology is a light sensor and sound sensor. Science Store for the Stars sells all OWI Robot kits!
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