What are some good places to hang out in Indianapolis for a bunch of 13 and 12 year old girls?

I wouldn't bother with downtown Indy. GW mall sounds like a good bet. And across County Line Road, there is the Incredible Pizza Co. The food is ok, but the games are fun for all ages. They have mini-golf, go karts, and lots of other fun things to do. You don't even have to get the buffet to play anymore. My family, ages 42 - 9 years of age all had a blast when we went.