I'm still chuckling over sand in the tabernacle! Sounds rather uncomfortable!
'Round these parts, the kids pretty much know the names of everything. We use vagina, though I know it isn't fully correct (I just don't like the way vulva sounds!). Chiara took to calling her parts her "privady," as in private parts, and when I was a kid it was all casually referred to as one's "bottom."
But my sister...our funniest story. When she was about 5 she walked in when my dad was shaving in the nude. My parents were pretty open with that sort of thing, as I recall. Anyway, she pointed at the obvious and said,
"Well," said my dad, the scientist, "that's my penis. Boys have a penis, and girls have a vagina."
Now, we went to school in a predominately Hispanic section of town, and our classmates all had their particular lingo--slang and accent that we picked up as impressionable white girls. So my sister looked my dad square in the eye and said,
"Nuh-uh, it's called a POOOO-seee."
25 years later, my dad STILL tells that story.
I seem to recall hearing the the movie "Free Willy" garnered a whole lot of laughs in Europe.