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MotoBOT.4 brings robotics to life for your young engineer. With simple tools and one AA battery, you will build 4 mechanical robot models, one at a time. Build and rebuild over and over again. There's the Bug, creeping you out with all 6 legs. The Truck's transmission keeps things rolling. The biped Tumbler makes you giggle. The angry Robot - what's his deal? The answer must be in the gears.