The HABA Water Play Mat Big Whale is a real sensory experience for all babies, because it shows exciting motifs and inhabitants of the underwater world. There are many optical, haptic and acoustic play elements to explore via the large peep window. Babies can easily move all the elements in the water back and forth with their hands. This is fun, strengthens the muscles and promotes motor skills in the prone position. Babies lie very comfortably on the HABA Water Play Mat Big Whale because it is surrounded by a soft fabric cover.