J.G.
I help my 2 year old brush his teeth, but my 4 year old is on her own. She also washes her hair and and her body.
My 4 year old has also started flossing her own teeth. She doesn't really floss them, but play is important in learning.
In fact, my 2.5 year old sons mostly dressed himself, and my daughter has been dressing herself for 2 years. She comes to me every morning and asks about the weather, so she has an idea of what type of clothing to put on. I buy them shoes that don't require me to help them, so I don't even do their shoes. Sometimes they end up on the wrong feet, but oh well, they should do for themselves what they can do, even if it isn't perfect.