The only problem is once they are old enough to do the work they:
A. Get a smart alec mouth.
B. Get mad when you tell them how to do it properly, say "I know, you don't have to tell me", then proceed to do it wrong.
C. Go into the bathroom and spend about an hour in there right after dinner because they know you will make them do dishes if they are spotted anywhere near you.
I had to laugh the other day Chelsie told me that I was going to be in for a shock when she moves out...because she's the main house cleaner around here. OMG!!! I have to tell her 15 times to vacuum the floor and it takes her 4 days before she gets it done.