Negotiate. Think about why you want it and why your parents dont want to give you one. Then sit down with them and talk about it.I assume you want it for entertainment. On this point you can argue that it is entertainment for the whole family. Mothers tend to love the sport based workout games for example. I assume your parents wont get you one due to:1. the cost2. they dont want you to sit on the couch all day.For the first you can negotiate a payback system out of your allowance, chores or from a paper route or something. If they agree that is is not for you but for the whole family you might argue to split the cost 50/50 for example.If it is to keep you active there are two things you could say. Either you voluntarily limit your daily or weekly usage (like only one hour a day or only in the weekend for example). Alternatively focus on the physical aspect of playing the game as opposed to the regular controller of other platforms.Remember however that negotiation is based on trust. Anything you promise you HAVE TO do. Dont try to scam your parents!