Man, is this ever familiar! Yes, even hairdressers kids do this! BOTH my kids, when they were little, cut their own hair with kid scissors. And NO I couldn't fix it even being a hairdresser!!!!! Sometimes these things aren't fixable, BUT like Lynn said its hair and it will grow back. And when your kids are teenagers like mine, you will laugh your butt off about it, even though its not funny now :/
If it makes you feel any better, my DD18 went to the nail salon the other day and had her eyebrows waxed with her friends, now mind you, I do this to her for free, and I have a wax machine here at home. Well we gotta be like our friends right? NOW she has like one thin line of eyebrows and looks like hell. Well well well aren't we intellegent??? I just shook my head and laughed. Then read her the riot act, nail techs aren't licensed to do wax, thats what takes food off our table I told her

But it could be worse, I once had a little boy come in the salon that got hold of his dad's electric razor and shaved OFF the back of his hair. ACK!

Hang in there!
Marlene