Maybe instead of chords try to teach some easy single note songs? Yesturday or such, just the melody, its quite simple and it might be even easier then chords sometimes, espesially barred chords for small kids might be hard, also house of the rising sun is what teachers teach to kids when they start playing, maybe some boogie could be easy too, I remember learing aura lee too (love me tender) lol.
PS. you can go find some midi files for them online to play with, its alot easier then with backing tracks cause its like the actual song exept with no singing also you can use programs to edit midi files to be like BT's later on, or you can just play chords for them while they play the melody, that would be nice![]()