Children explore the world of music, melody and rhythm with this colorful and durable musical stacking set! It features different-size blocks that easily stack in any way kids want—for a fun way to develop shape and spatial awareness while exploring music. Plus, the featured instruments—a drum, a xylophone, a rattle, a scratchboard and a gong—can be played while stacked or on their own. The blocks even nest for convenient storage. Wood and metal set includes 5 instrument blocks and a drumstick; largest block measures approximately 5" x 5".