OK, for all you teenage gurls out there, you guys don't want a babyish party for 3rd graders, you want a party that has swimming, shopping and fun all in one cheap, parent friendlly enviroment!! Balloons make good decorations! Streamers! Set up a volleyball net, with more than one beachball! Set up a slip and slide if you don't have a pool, or have your parents turn on the sprinkers! Set up a wading pool! Buy floating seats and fill them with water to sit on instead of chairs!! Stay up late and have sparklers! Buy a lot cause everyone loves them!!! Have make up or tell gurls to bring their own to do makeovers. Bring hair stuff, believe me eveyone wil want to do each others hair and it looks GOOD!!! Have silly string fights! Have sparkling cider!!! Go to the mall and buy stuff! Play truth or Dare. Set up a snack station with some junky stuff like Chex Mix and chips and cookies, but have some good stuff too, like pretzels and fruit and veggitables!!! Have dips for all of them! Make choclate covered pretzels! Strawberries! Blueberries! Make a cake with all your friends! Make cookies and brownies and eat the batter!!! Play football, baseball basketball!! Have a tent set up in the backyard for girls that aren't active. Make teams for sports and have a cheerleading squad for people who don't want to play! HAVE WATER BALLOONS!!!!!!! Have a campfire made from Xmas lights!! String Xmas lights around a room!! Buy a disco ball! Make a disco ball with tin foil wrapped around a balloon or a beach ball. Don't disobey the parents or they'll chuck ya out! and make ya go 2 sleep!!! Be nice don't let any other people be left out! Don't have a plan, just play it out, it goes better cause gurls may not wanna do the things u plan! Have funnnnnnnn! I hope u find me helpful!!! Luv ya alllllllll!!!