Straightening iron flattens curly bangs so you can trim them at home
Rednexmama came up with an excellent haircut hack:
I refuse to spend $10 just to get my daughter's bangs cut, but it can be more than a little challenging since she has naturally curly hair and it's next to impossible to get them cut straight. Even if I wet them down, they dry fast enough to start kinking up right quick. This is when it occurred to me to use my hair straightener to get them pin straight (it only takes one quick pass, 2 seconds, tops). This way, in two quick cuts she can be on her way.
Of course you need to know your kid will sit still enough not to risk burning them, but otherwise this is awesome. And to be honest, trying not to nick her with the scissors and I checked the straightness for the tenth time seemed much more dangerous than the couple of seconds it took with the straightener. If you're worried, you could always tuck a dry washcloth between her hair and her forehead.