What happened to his knee :O
Ahh you're somewhat like my partner, who saw the benefit of doing certain things (like the many art projects that ended up scattered around the house, and letting tiny tiny children "help" with chores) but couldn't tolerate actually doing them because "it's messy" and "I just want to get it done!" XD
my kids are a lot older than yours so we have entirely different problems now XD
Sounds like you had fun painting with him, will be you be doing it more often? :D
Does your kitchen or bathroom not have tiles or are they too small for this kind of thing? I love the artsy paint splash job on his truck.