In the Shinozaki Violin Method, Vol.1, no.62-66 are dedicated to learn the notes on the G string.
It is true that we do not use G string as often as other strings, however, I felt we need to spend a little more time on practicing on G string, and I made the exercises below.
Children are so creative sometimes, and I do enjoy them, so I asked the below assignment to put the title on each exercise as an optional.
By scrolling down and click the download icon, you can get the sheet music of it FREE.
G string practce
By singing and playing, what kind of feeling do you get from the piece?
Based on your feeling, you can create your own title on each piece.
More reading: Preparation for Good Left Hand Position for beginners