Oh Anne my 5 year old has just decided to grow hers out this year too!
We made it a condition that she had to let me clip it back every day, and now that its in her eyes, she's more than willing to let me do it. I actually plait it and then clip it back - although if I braid her hair its now long enough to go in - very exciting!
And I so agree with not making a big deal out of the scar - I'm amazed at the confidence and self-love that my daughters have and don't want to do anything to lessen that in any way too soon... it will happen soon enough I'm sure
Em has a surgical scar on her belly and she is not even remotely phased by it - in fact I've had to teach her not to go lifting her clothes up to show everyone LOL