D.K.
Jewelry making or some kind of craft project that they can take home is good!
Don't know how much room you have....basement, etc. but TWISTER (you can have two teams) or the new TWISTER HOPSCOTCH.
One of my FAVORITES (even for adults) is to tie a string to a blown up balloon. Each girl ties the string to one ankle. On the "GO" signal everyone starts to try to pop everyone else's balloon. You are OUT if your balloon gets popped. Last "balloon standing" wins.
Also.......you can go to places like CARD PARTY OUTLET and they SELL books that are nothing but party games.
You didn't mention a theme. Do you have one?