T.K.
Hi A.!
I think a pottery place would be fun! I went to a Bridal Shower at one, and everyone loved it. There were even little kids there who loved painting their own piece. They have piggy banks, light switch plates, etc. So the kids could make something they would use. I'm not sure how much it costs, but I don't think it should be too much since your guests pay for the piece they paint. Here's a link to a list of cities and where there's a studio:
http://www.ccsaonline.com/studios/studiosPaintCity.php?st...
Good luck!!