The Montessori Ball Cylinder is made for infants of about 6 months old. The balls and gentle rolling sounds that are made when the cylinder rolls are very attractive to a child who is eager to scoot or crawl. Babies love to study the movement of the balls and, when it is placed just out of their reach, begin to move towards the cylinder in order to get their hands on it. Babies also discover that picking up the cylinder and shaking it produces a sound. They love to practice this as they discover their actions have effects! The ball cylinder rolls very well on carpet or hard floor so that the child can work their muscles and go after it.