Daughter and friends while school wasn't in session, last year. Nothing formal; they appreciate "better redstone" tips and were delighted to show off the work they were doing but "real" was like a cognitive gap for them...

~12yo might've been too young, or too old; and my failures to communicate don't reflect on them. Still. It was disconcerting; I was tearing up TVs and stuff at that age and they fear to use a tool.