I am jamming with an 8 year old musician. He just learned rhythm and counting time 1 2 3 4. Now I try to teach him how to play in key. I play a C chord on guitar, he plays white keys on the keyboard, and he composes a melody. I think scales are too much for him to grasp right now. He is learning major chords now. But how can I introduce a G scale with it's F#?