Kikkerland Rainbow Maker was my teacher friend Annette’s top pick! You suction the Rainbow Maker to a window that has sun exposure and it solar powers the tiny gears that rotate the crystal creating a rainbow though out the room. Annette has placed on her classroom window that gets sun for an hour each day… this has become a special time for the class of third graders. Rainbows will happen thru crystal when solar motor is not turning. You can experiefnce the art of the rainbow in your office or home.