Tummy time water mat helps babies enjoy tummy time. Makes neck and shoulder muscles stronger so your babies can learn to roll over, sit up, crawl, and pull to a stand. In addition to preventing flat heads, this sensory baby play mat also can enhance hand-eye coordination and improves your baby's motor skills. Just need simply inflate the outer ring and fill the interior part with water.Set it on the carpet and let the tummy time begin! After using, you can empty the play mat and drying it, roll it up for easy storage.