Need Ideas For 13th Birthday Luau Sleepover Party!!

Well my birthday is on August 12th and i thought i should start thinking early this year. I have decided to have a 13th birthday sleepover luau party. I am inviting 9 of my closest friends and 4 of them are soming very early to play paintball with me at like 11:00, the rest of them are coming around 5:00 for the real party. I am having lots of beachy decorations and we are going to my neighborhood pool. Other then that i can not think of anything else to do for my party!! please help with game ideas and food ideas!! please...thank you!!!
~ Hallee~