A friend of mine did a similar party - she called it a "Not Quite Slumber" Party! The invites were in the shape of a bed with pillow. They did "spa" stuff like pedicures and manicures. Had hot cocoa and popcorn while they watched a movie. They camped in front of the TV with pillows and blankets. Everyone came in pjs. The treat bag to send home was a small travel bag with toothbrush/paste, and other goodies like a comb, mouthwash, lotion, nail polish, etc. The girls' names were written on these with a Sharpie. Everyone brushed their teeth before the parents picked them up. It was really cute!
Andrea