With the Cover 'n Play Bouncer, even the most active babies can't kick off the blanket (it's attached), so they stay comfy and cozy. When you don't need the blanket, it tucks conveniently underneath. Calming vibrations help keep baby relaxed and can be switched on or off. And, to keep Baby entertained, the toy bar features removable rattles to stimulate auditory senses, and brightly colored teethers to encourage visual and tactile skills. Removable pad and blanket are machine washable and dryer safe. Requires one "D" alkaline battery, not included. For use only with babies who are unable to sit up unassisted.