16 developmental activities to help baby develop while having fun Baby activated responsive toy with entertaining music, teaches baby about cause & effect Adjustable arches can be easily arranged in a variety of ways, or removed, to enhance your baby’s developmental environment. The open arches mode creates the ultimate tummy time space, allowing easy parental access for better bonding time. The toys are detachable, making it easy to play with a favorite on the mat or bring it with you when on the go. Mirror for extended tummy time