The Fisher-Price® Rollin' Surprise Mouse is sized just right for your baby to grasp and push for sit-at play or crawling fun. As the push-along vehicle rolls, the mouse's clear back lets babies watch the gears turn while the cheese spins around in its belly. When they're ready to move, your baby can follow their rolling mousey friend for exciting crawl-and-chase play! Where development comes into play™Gross Motor Skills: The wheel of cheese spins around as the mouse rolls along, encouraging your baby to crawl after the vehicle, helping to foster gross motor skills.Sensory: A variety of colors and textures engage your baby's developing visual and tactile senses.Curiosity Wonder: Your baby is introduced to the fun of cause and effect as they discover how to make the cheese wheel spin by pushing the vehicle.