Sounds great! You guys are going to have fun.
The invitations sound so great! And CHEESE FINGERS? ;)
Take lots of pics, she will want to remember it and so will you!
(I never thought I would say this before the party, but even with all the adult parties I have gone too, my daughters took the cake in some GOOD CLEAN FUN!) It was awsome and I wish I could do it all over again exactly the same.