Is it safe to use hair iron to the children ?

my niece is 7 years old, I want to buy a hair iron as Christmas gift to her. Is it safe for her?Is it safe to use hair iron to the children ?
I think you need to help her, do not let her straighten or curl her hair by herself.Is it safe to use hair iron to the children ?
It's probably not a good idea. Wait until she is 12 or so. She's very young to be worrying about straightening her hair and she'll need adult supervision if she does.