Meet the WaterColorBot: a cool robot that moves a paint brush to paint artwork onto a piece of paper. It dips its brush in water and chooses the right color to paint. The robot works with standard and common watercolor paints, pens, and paper. It has two motors in its frame.
Must see robots & drones:
WaterColorBot Water Clock
Not super cheap, but this is a fun robot for kids to play and experiment with.
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