I'm 14, too! Just grab some friends and go to a movie or something. Have a sleepover with like eight friends, rent a movie, eat a cake, go to bed.
Get a cake of your choice, go to a place you've always wanted to visit, and basically just chill out
I want to do something special maybe at my house but I don't know wha to do that's not childish and is cool. Any ideas? Even somewhere else like dollar skating?