i need a theme for teenagers and pre teens but its going to be at night in my back yard im a girl going to be 13 and its boy girl

do you have trees in your back yard? if you do string x mas lights arouind them andset up cushions or like a couch near them to hang out

Well....i might be having one too and what i might do is have a bonne fire and roast marshmellows and things like that also depending on how much room you have you may and probably will want to get a table and serve drinks and candy....chips and stuff like that......but really teens just need their friends and they will figure out something to do.....sorry i couldnt be to much help...