My oldest is now a teenager (YIKES!) and has graduated from occasional assistant painter with supervision, to a full-fledged solo painter. He told me he found it relaxing - I said "Welcome to the club."
He's also been bitten by the Mordheim bug. He's added to a Beastmen warband (using the minis from last year's Chaos Warband project), using a few Ungor that I picked up in an eBay lot. Here's his handiwork:
They still need the bases painted, and they're not winning any Golden Deamon awards, but I think they're pretty good for a kid, don't you agree?