Roll, CLUNK, discover. The gradually widening track propels the balls forward fast until suddenly they drop, perfectly, gracefully into their matching colored slots. Meanwhile, fine motor skills are bolstered and an understanding of size and color is fortified - Plus, the balls all have built-in rattles for an extra twist of sensory fun. Simple fascination inspires hours of exploration with the RollAgain Sorter. Includes sorter and 4 balls. For ages 12 months and up.