As soon as their hair is long enough for a bow, go for it! Sure they are wiggly, but speak in a calming tone, tell them how good they are, and praise and treat when you are done! Wosie sits perfectly still now for her bow because she knows she is going to get a treat after!
Now if someone could tell me how to get the bows out without breaking her hair, I would appreciate it! I hate the idea of cutting the elastic all the time as I can't figure out how to put another elastic in and make it look nice.