Well, my kids are old enough that they actually go to the bathroom when they're there. And The Girl has OCD about washing her hands all the time. I've got to invest in soap. But way back when, The Girl washed her hair in the toilet when she was 3 years old. She and her friend both thought it would be a brilliant idea. We laughed and laughed when we saw their wet heads, after "eew"ing and telling them not to do it again of course.