Fill (music) facts for kids
Fills are usually played with a keyboard instrument or a guitar, but other instruments (such as a saxophone) may also be used. Drum fills are sometimes called "drum rolls", but a roll is actually a steady beat on a single drum, while a fill may use more than one drum or beat.
Images for kids
G run in G major contains both hammer-ons and a pull-off.
Fill (music) Facts for Kids. Kiddle Encyclopedia.