The Musical Mix ‘N Roll 4-in-1 Activity Walker from Baby Einstein is a playtime remix that encourages self-expression. This infant activity center grows with your baby from sit to stand to dance and discover! Each of the 4 modes of the musical activity center will captivate your baby for their current stage of life. When used as a floor toy, the removable panel is your budding musician’s opening act. Walker mode lets baby practice standing and strolling with the baby push walker design.