So there would be 10 slips in the hat/bowl that the girls choose from. They can do Rock Paper Scissors to see who picks first. The girl who picks sits on a stool or chair and gets the sauce dumped on her head by the other girl and they go back and forth taking turns. Also put in a few slips that say reverse so if the girl picking gets that slip then the next sauce picked goes on the other girl (basically a free pass). Have the girls wear their hair down as well!