How would you explain what a flame is to an 11 year old? How about what a colour is? These are great science questions that are actually terribly difficult to answer to the satisfaction of an 11 year old.
The Alan Alda Center for Science Communication challenges science communicators to answer these questions in a competition where they will be judged by 11 year olds. This year’s question: “what is sleep?”
Anyone wanting to submit an explanation, check out the website.