Holding on to my baby!

Recently Kaylan has been trying to stop this habit of sucking on her hand. She started doing this when she was only two months old, one day she just stopped taking a pacifier and started sucking on her fist. Well as she has grown she has continued to do this and it has become kind of a bad habit. She went to the dentist last month and she came home and said "the dentist said I can't suck on my hand anymore" she was so sad. I know she is getting old enough that she probably needs to stop but it is about the only "baby" thing left that she still does. So it makes me a little sad too. Pictured below is her hands when she sucks on them. She loves to have her nails painted but her index and middle finger always lose the paint first because of them being in her mouth. Ever since her talk with the dentist she has done pretty good about not doing it. But ever so often when she is sleepy I see her hand go to her mouth and how terrible is this I don't stop her even though I know I should. I just think that I will have all the time in the world when she is all grown up but only a short time when she is a baby. So I'm hanging on to that one thing that makes her a baby still for as long as I can.