What should I do for my party?

Okay well fist of I am using my sisters account to ask a question because she let me, so I just wanted to let you know this isn't the usual user of this account. Here's my question: My thirteenth birthday is on Thursday, so I am going to have my party on Friday. Me and a friend or two are going to go so a movie and then they will spend the night. So what else could we do after the movie back at my house? Any suggestions???