This is a wonderful illustrated chart designed especially for children.It contains two octaves in the bass clef. The notes are represented by different insects to make learning fun as well as educational! Each insect has a name to coincide with the notes.'Cuthbert the caterpillar,''Daniel dragonfly,''Frankie fly,'Clarence caterpllar' and so on.This will make the process of learning about the bass clef an easier task.