One of the things we offer is spa parties. These are tons of fun. I did one recently for a small group of girls having a birthday slumber party.
We did manis and pedis and facials with cucumbers (definitely their favorite part). There was a make up station for the girls to apply their own or each other's make up.
We also made our own bath salts, which the girls decided to do like sand art and made layers of different colors in their jars.