For my daughter's 11th birthday she had a makeover party.  She had lots of mascara, lipstick, eye shadow and nail polish in funky colors like silver, metallic blue, and neon green (buy enough to make sure each girl has their own).  The girls paired up and did each others makeover. They then judged and gave prizes for best makeover, funkiest makeover, most outrageous makeover, etc.  Party bags included the make-up each had used plus nail polish, lip gloss and butterfly hair clips. Pictures were taken of each girl and when developed, these were used as thank you cards and a memento of their fun time!