Birthday Ideas....................?

Hi! I will be turning 14 in a few months. I know I have a lot of time, but I want to start organizing my party. My birthday is in the middle of the winter. I am inviting a few of my close friends. I want to do something super fun. I most likely will have a sleepover. The main thing, however, is that I do not want to spend much money on it. Food is different, so I'm not worried about the cost of that. Ideas I have now are dessert dinner, movies, and sledding. I need help, so please help me! Thanks! :)