Birth - 3 years. Engage children"s senses with lights, music, and things to touch and play with. Gym transforms into five different play centers as the children grow: traditional play gym, seated activity center, stand-up center, play table, and easel (paper not included). Features three caregiver-selected play modes: "motion activated," "songs," or "piano", as well as sleep mode to extend battery life. 12-point adjustability and locking feature. Batteries included.