The electronic discovery center includes lights, music, and whimsical sounds. Multi-position height adjustment for growing babies. Open area and cup holder on tray for snacks. Walker\'s wide stance and easy roll wheels makes learning to walk effortless. Seat and base lock for stationary play. Assembled dimensions 29\" x 26\" x 29\". Stationary Activity Center should NOT be used if the child weighs more than 30 pounds or is more than 30 inches tall. Walk-Behind Walker should only be used when your child is ready to walk.