Removable Tray: The activity-packed, detachable panel is perfect for babies who can sit up; it can also re-attach to the walker for on-the-run fun on both carpet and bare floors Auditory Training: The activity center for baby boys and girls includes five piano keys that play musical notes and a telephone handset to encourage creativity and role-play fun Motor Development: 3 shape sorters, light-up buttons, and colorful spinning rollers are featured on the baby rolling walker to help define motor skills Balance Development: The toddler walker activity center helps the development of stability and movement skills as well as fine motor skills and hand-eye coordination Adjustable: Two-speed control switch on the walker allows growth along with your little one\'s changing speeds; the perfect baby walker for boys and girls alike