If your looking for party ideas for a 12th party then I've got one right here. If you really like music and movies then this is the party for you. First of all, You could make some invitations with construction paper, (preferally 12 people since your turning 12)glitter,and gel pens. All you have to do is pick your favorite color of paper and fold the paper in half. Next you write on the front whatever you would like to call this party. I call it a "Hang Out Party!" Then on the inside you can write your home address, the time of the party, and why you would like that person to come. The next thing you will need to prepare this party is to pick 12 of you and your friends favorite songs. You can play these songs during the party. After that, Blow up balloons and throw them all over the party room(s). It's optional but you can hang up 12 sets of streamers if you would like. You may also hang up 12 pictures of your best friens and yourself. One thing I think is a challenge is trying to think of 12 games to play during the party. ex. sherades, any type of board games, any card games, computer games(if you have a computer), I even made up a game myself. You get a whole bunch of dress-up clothing and/or assesories and put them in a clean garbage bag. Then put one of your 12 favorite songs on and make everyone pass the bag around in the circle. When the music stops, someone has to stick their hand in the bag(without looking), and pick 1 or 2 things out of the bag and put it on or hang on to it depending on what it is. You keep doing that untill all the clothing/assesories are gone from the bag. Anyone who has less than 12 things on gets 12 little candies for their prize.(for ex. you could just use those little gummie bears you can buy from almost anywhere). Anyone who has more than 12 pieces on then they have to do 12 push-ups and still get 12 little treats for participating in the game. And again, All of this is optional. Whe your 12 favorite people leave then you get to clean up the mess and have a blast again next year, except with your 13 most favorite people.