3 years & up. Invite children to experiment with sound using the Musical Wooden Marble Tree! Encourage children to hypothesize as they drop a marble at the top of the tree and listen to the beautiful, acoustic tones each branch produces. This musical toy enhances hand-eye coordination and fine motor skills as children grip each marble and visually track the path down the tree. Includes four glass marbles. Marble Tree measures 6.3"L x 6.3"W x 14.6"H.