We received just one 8x10, and 4 4x6's, plus the one picture of the castle. I don't know if you can get separate pictures for each child, but I would think so, since you are paying for it. Hopefully someone else can help you here.
PS: We were a party of 4, but only my daughter wanted to have her pic made.
It's actually one 8x6 and four 4x6's. The folder they put it in makes the 8/6 look bigger. We didn't get a picture of the castle (you do at CRT though ).
They usually do one package for a party of four or less. The quote is from the Akershus page on allears.net
"Large parties are broken down into approximately 4 people per package."
Just had another thought. You might get only one package, but if they take several pictures they could be put on a PhotoPass account. The picture in my signature is my "package picture" but on my PhotoPass account another shot showed up. So I actually now have access to two different poses.