Use the chubby, easy-to-grip mallet to pound one of the 4 brightly colored balls through the top and watch as the ball rolls to the base of the tower. It takes several hits with the mallet to force each ball through the opening. Made of solid wood. Tower is 5.5"W x 9H", balls are 1.75"D, and the mallet is 6"L. From 2 years.