With the Little Tikes Giggly Gears - Dizzy Gears, you can stack, wobble and spin! Stack the colorful gears and watch them spin. The hands-on play patterns will entertain your infant for hours on end! Gears are interchangeable within the Giggly Gears collection! Product Features: - Customizable and stackable gears - Automatic shutoff and on/off switch - Interchangeable gears within Giggly Gears collection - Batteries not included (3 x AA) - Ages: 9-36 months.