I'm my son's Sunday School Teacher as you might know (and doing a rubbish job as you do not). Ages ago, possibly following a 'lesson' the day before, but on the Monday morning school run, my son dragging his feet, I said:
"You know, in the eyes of the Law I am an adult, but in the eyes of God, I am a Child. Race you to the corner!"
That got him going!
I tried to explain it later. Sometimes I think he'd be better off in a proper Sunday School. Other times I think no.
I remember this just now, so I thought I'd share it with you.
When you're rebooting, all kinds of memories come up.