Is this appropriate for a children's novel?

I can give you this much:

1. If the father is speaking to an eight-year-old daughter, consider whether your novel is a First Chapters or MG. First Chapters is probably better for an eight-year-old. (Kid's like to read books about people their age, but kids also think "kids my age" means "kids two years older than I am" to people 18 and under. It's just part of our psychic to think we're mature for our age, until we get to the age when we don't want to be our age quite as much--people 30 and older. lol)

2. Skip the whole question on whether it's okay to use it, and start thinking "Is it okay for ME to use it?" It's okay if a famous writer writes another kid's book. It's not quite as okay when we first-time writers do it. My novel is a true MG (main character is 10 and three out of five main characters are 11. Other two are 45 and 4, so they're not BFF in the traditional sense), and, even though I could say crap when I was a kid, even in front of my parents and grandmothers (but never in front of nuns or priest lol), I still didn't use it in my novel. We have to edge towards cautious more than authors do. (Authors-people who have already published and made money from their writing.)

3. And then there is the old adage, "If you can only come up with curse words, than how creative are you?" Again, I suspect crap is socially acceptable in a MG, maybe a First Chapter, but its still a vague word that doesn't pack much punch, because it's such a cliché word anymore. And, ewwww, think of that in literal terms. Kids will. lol Now, keep thinking in literal terms and pick something new that she really looked like. It solves the other issue.