The Solar Grey Cat Wobbler will dance endlessly powered by the solar cell in it's base and normal interior lighting. Plastic construction and the toy is packaged in a clear clam shell holder. Cat will dance as long there is light to power the solar cell in the base. Need no batteries. Plastic construction and the toy is packaged in a clear clam shell holder. Toy is 3.25" tall and 2.25" wide and deep.