My daughter has had a sleepover every year since she was 5 or 6. She turned 15 yesturday, and doesnt want one this year. /cry. The most successful thing that we did was shakes. I got a selection of candy (m&m's, gummy bears, oreos, nerds, cookie dough, chocolate mints, etc..,) and i have a blender that makes individual servings. I just add the ice cream, a little milk, let them pick the additions, blend, pour in cup, get the next girl. Also, they always seem to find something to do. Make sure you have lots of music, and a wide open space for them to play. One year they all raided her closet and got in the slider pants and sports bras and made a dance squad. I also have had a nail party too, we went and got a ton of different nail products, great colors and add ons. All the girls sat around the table, soaked their nails, scrubbed them, and then I filed them and painted them. For the next couple hours I kept getting "oops" can you fix this, but it was fun for all of us. Movies never worked if there was more than 3, too many different tastes. What ever you decide to do, dont make it too structured, let them have fun. they can be very resourceful when you get a bunch of girls together. And keep plenty of drinks, and disposable cups, (Disclaimer, make sure none of them still have problems with drinking late at night or you may find a puddle in the morning).