Tell your parents the benefits of what you want and why you deserve the item. According to an article in wikiHow, “How to Convince Your Parents to Buy You Something,” it states, “Tell your parents how it will achieve something beneficial. Frequently bring this point up in your conversations.” Also, tell your parents why you think you deserve the item. Another way to think about it is: tell your parents why the item is a good thing for you to own. If you tell them why you think you should have it you have a better chance of getting the item, and they feel that you are growing up which may make them emotionally inclined to get you the item.
Logos is the logic part of the persuasion. Make sure that you have a logical idea of how to stick to your end of a deal and also how parents can stick to their end of a deal.
Tell your parents you’ll do something for them in return if they buy you the item you want. Sign a contract so that they must stick to their end of the deal! It’s best to start with a low offer for what you'll do, for example, I’ll load the dishwasher for two weeks instead of I’ll load the dishwasher for two months. When you’re telling them what you’ll do for them, it’s best to know what your parents like. For example, if your mother likes gardening and she’s expecting a new order of mulch, tell her you’ll help her spread it for as long as she wants if she gets you the item you want. This means that both the parent and the kid gets what they want. Who wouldn’t want a win-win situation?