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What about watching a movie? You must have some of those at your house. You can also check out the television guide to see if anything interesting will be on. You could tell ghost stories at midnight? Let everyone know ahead of time and I bet you'll hear some truly creepy tales. Turn out all the lights, get in a circle, and let the terror arise.

I second the spa type thing that Nerd suggested - a lot of girls do that at sleepovers. There's also cooking - you could bake a cake together or make cookies. S'mores are always fun, and they're fairly inexpensive. Board games can be fun, too, or card games. If you don't have any, make up your own. Or ask people to bring them.

There's also just plain old dancing... get some space, crank up the tunes, and just dance for a while. You guys could take a walk around the neighborhood depending on how chilly it is outside. You could have some kind of Talent Show or Karaoke if you're comfortable enough to suggest that.

Don't forget, you don't have to be doing something every minute. Try to plan quieter activities the closer it gets to bedtime, so that you guys will fall asleep easier. If your friends have suggestions, take them into accounts - I bet they've probably got some great ideas, and not just to play the Wii all night, either. After all, the Wii is just new and exciting but I imagine it will get old very quickly with five girls sharing it.

A few things I do suggest, is to tell everyone as soon as they arrive that you're all sleeping on the floor. No fighting over beds and couches that way. Avoid playing Truth or Dare unless everyone is very comfortable with each other. Try to avoid eating a ton of sugar right before bed - it's hard enough to settle down at a sleepover with that. If people start getting too hyped up, try to come up with something that's quieter - looking at magazines, watching a movie, whatever. Also, don't get too angry if your parents peek in on you occasionally. It's better to have them around in case things get out of control, than to not have them present if things do!

I googled it as well, and found a couple of sites that might be helpful. If you've already looked at them, well, it can't hurt to take a second peek: [X] [X] [X].

Above all, remember to have fun. After all, it's your party, too!

Have fun, Kit Kat!
^_^