1. Before you decide on a topic for your demonstration essay, be sure to know your target audience—if you're writing for your history class, a demo essay on how to ride a skateboard wouldn't be a very good fit. A good demonstration essay is written for a particular demographic (peers, children, a teacher, etc.), so keep that in mind when choosing a topic.
A demonstration essay is a 'how-to'—how to do something or how to perform a task. Here are a few examples:
How to build a doghouse
How to wax a car
How to save for college
How to unclog a sink
How to make a pizza
Choose a topic that you find interesting. Think of a favorite hobby or skill you've mastered. The more familiar you are with your topic, the more informative (and effective) your essay will be.
Go here for a list of sample demonstration essay topics: http://www.speechmastery.com/demonstration-speech-topics.html"