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 14.6" H x 6.3" W x 6.3" L.