What is harmony?
Harmony is when two or more notes are played at the same time.
"Harmonies can turn a good song into a great song."
Use the BBC Bitesize KS2 'What is harmony?' video to find out more: https://www.bbc.co.uk/bitesize/topics/zcbkcj6/articles/zgxx2nb
On the same webpage is a great performance by the Ten Pieces Children's Choir.