My now 9 year old son started using deodorant at 7 and actually is proud that he smells "like a teenager" and my 7 year old daughter doesn't need it yet but I am waiting for the day which I know will come sooner than I like. One friend recently recommended using baby powder rather than deodorant because it is milder on their young skin. I have to say, on a funky 9 year old, it worked like a charm! I haven;t had him go back to deodorant and I'm happy he doesn't have to use man-chemicals for now. He really likes it too. I plan to use this method for my daughter as well. Try it, you daughter may prefer the powder too.