Sweet sixteen?

i am turing 16 in a couple weeks and i want to have a party. i havent had a birthday party in years (pathetic, i know) and i really have no idea what to do. i want to invite about 10-15 girls. i have limited space (i live in one of those tiny suburban houses w/ a 30x30 ft. patch of gr for a yard). i was thinking maybe a bonfire in my backyard and some movies later w/ a sleepover. it doesnt seem like enough though. any other ideas? please be creative, 10 points to best answer, thanks!