I bought a 50 Honda for my 1st daughter when she was about 7-8 or so. I took here out on a big grass field to teach her and she did OK after a few runs into the woods by accident. We were out camping in the mountains the next time on a gravel road....I was running along side her giving instructions when she started to get to much speed and started screaming......I ran faster.....I was at a full sprint when she found the breaks

My right leg SMOKED the foot peg at a full gallop.......RIGHT to the bone. Bad day in the mountains. I found some 1st aid crap and sorted it out till Sunday when we got off the mountain and to a hospital a couple of days later. The doctor said..uh when did this happen? I said a couple of days ago, he says why didn't you come in sooner?
I said why ruin a perfectly good weekend for 20-30 stitches?
He seemed unimpressed

My daughter never wanted to ride again I'm sorry to say.
Be safe, cool bike