Will you write me a 500 word essay on 'things that make you laugh'?

No. WikiAnswers will not do your assignments for you. Besides, nobody here has any idea what sorts of things make you laugh. Laughter and a sense of humor is an individual thing, and everyone laughs at different things. Here are some things that most people find humorous however: puns, physical humor such as clumsiness, other people doing dumb things, and things which end in a surprising way. You can also use a search engine such as www.google.com or www.dogpile.com to research humor and laughter.