All-in-one design: bouncing activity saucer(6-12 months) activity center(6-12 months) play table(12 months+) or study desk & foldable chair(12 months+) 3 height options make it ideal for kids of different heights Press the jumping button slide down the button and twist the foot to ...All-in-one design: bouncing activity saucer(6-12 months) activity center(6-12 months) play table(12 months+) or study desk & foldable chair(12 months+) 3 height options make it ideal for kids of different heights Press the jumping button slide down the button and twist the foot to adjust Comfortable and skin-friendly seat cushion brings kids ultimate comfort 360° rotatable seat & removable toys for added fun Lighted piano requires 3 AA batteries not included ASTM/CPSIA compliant for safe and reliable use Easy-to-clean seat cushion is washable Assembly needed Installation guide