Manufactured to the highest standards, the top quality construction and accurate intonation make these bells the best value available. The CHROMA-NOTES® colors make it more fun to learn and play along with Boomwhackers music tubes and Boomwhacker educational materials. Each metal bell is marked with the proper note and number to help children learn the musical scale. Desk bells are struck on the top, making them ideal for young children, special needs communities or anyone with limited mobility. Set contains the 8 notes in a diatonic scale C-c. Features: CHROMA-NOTES® colors match the Boomwhackers play along with Boomwhacker music and material marked with note and number contains 8 notes in diatonic scale