Stacking blocks and a musical instrument all in one...what fun! The top of each of these 8 musical blocks is fitted with a metal bar that, when struck with the mallet provided, plays as a xylophone. Each block top also depicts a graphic of the note positioned on the staff, representing the full "C" scale. And, with the accompanying songbook, children can learn to play simple songs all by themselves! One side of the block teaches young ones about the instruments that comprise an orchestra. For ages 4 and over.