Should i let my 10yr old girl use hair removal cream on her legs?

My boyfriend's 10-year-old daughter uses Nair on her legs for the same reason. Her hair is very dark and she was getting teased. She doesn't seem to have any adverse effects from it, so your daughter should be fine using it. Of course, you'll want to test it on a small area of skin first just to be sure she's not allergic.