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Little LED lights, nine yellow and four blue, run from a battery box with a switch. 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Start with a flat pattern, then lift it into houses, garages and towers that hold together firmly. Sorting colours, balancing structures and solving little building puzzles all happen naturally as they play. 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Larger, stronger magnets make the pieces click together and stay put, which keeps small hands happy rather than frustrated. A colour manual with reference models gives you ideas to start with, then imagination takes over. 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