The Kolcraft Baby Sit & Step 2-in-1 Activity Center has an abundance of developmental and educational activities for child to enjoy. It features an activity center with tons of toys and different tasks for the child to perform. The 2-in-1 Activity Center grows with your child from a Stationary Activity Center (4 months to walking) to a Walk-Behind Walker (9 months & up). It helps the child develop all sorts of cognitive and growth skills. It only requires 3 AAA batteries and gives a lot of bang for its buck.