My oldest was 5, second was 5 (now he is 7 and still does a poor job), third was 2.
I have a friend who's DS who is 4, still runs out of the bathroom, pants around ankles and bends over yelling if his butts clean. It happens no matter who is over. I find it hilarious but not sure she is thrilled about it.
Wife to one amazing husband.
Mom to FOUR amazing blessings.