For my daughter's 13th sleepover birthday party we were expecting a bunch of her friends from school plus our family.  She is at the age where party favors are no longer cool, but I needed something to keep them busy.  I went to a party store and found a Simply Spray Party Kit. It is a kit that makes tie dye shirts without the mess of the buckets. You spray the paint on like regular spray paint. I went to Wal-mart and bought a bunch of cheap white pillowcases.  There were 23 girls at the party and each of them were able to make their own pillowcase. It helped to tell who's pillow belonged to who!  I only spent $19.95 on the party kit and the pillowcases turned out to be $1 each.  I was the hit of the party!