A motorized mobile that spins in light. A stainless steel tube with a solar cell and electronics as counter balance. Unique and entertaining, for all ages, but especially infants. It requires just average home light (200 lux) to spin occasionally. In more light, it can spin constantly. Hang from the ceiling in a well lit room. The solar cell faces down. Details: One foot long, one foot depth. Sweeps a circle of twenty inches. Weighs less than one ounce. No batteries or maintenance, and lasts for years. I assembled it in the USA. Patented.