Encourages Coziness and Safety Similar to a car ride, a gentle pulsing action calms babies and promotes the development of motor skills. Baby's fine motor skills and eye-hand coordination improve as they reach and grasp toys. Encourages Sense Sensation Visual stimulation is provided by activity toys and rearview mirrors. stimulates touch sense with a variety of textures Auditory stimulation is provided by a variety of sounds and music. The toy bar rotates back to make it easy to access the baby machine. Enjoy and use from birth up to 11.34 kg. Cleaning Seat Pad Needs 4xD No batteries are included. 8 Songs & 2 Sound Tracks Modifiable Sound Level Extra-deep comfy seat with head snugglers for support