A mobile or stabile has rotatable elements comprising a solar cell, a beam, and an electric motor. The solar cell is electrically connected to the electric motor in the same rotatable element. The rotatable elements are linked by attaching the rotating shaft of the electric motor of one rotatable element to the beam of the rotatable element above. Each rotatable element produces its own movement. When a solar cell receives light it powers the connected electric motor to rotate its rotatable element.