One of the first suggestions you'll get, particularly here, is that you join a critique group and it is a critique, because as writers, we've all been through the "Is this even worthy of reading? Should I continue?". Also, kids are great, but you sometimes need an outside opinion, with a bit more info!
You are a writer, so write and don't think about it too much. It's very hard to just sit there and continue to the end, without keeping your little finger on the delete key (or if you're old school like me, the pen scrawling the paper). Write it, finish it, leave it. Then relax and return. And read it again. If you find yourself thinking the same again, give it someone else. Perhaps not your daughter, though. She doesn't have an impartial opinion.
Good luck!