Mara Grunbaum and I have entered the 2012 Flame Challenge, a contest to answer the question “What is a flame?” in a way that an 11-year-old can understand. The contest is hosted by Alan Alda and the Center for Communicating Science at Stony Brook University. Answers can take just about any form – writing, audio, graphics or video. I thought it would be fun to gather some of the video entries on YouTube and Vimeo in one place. Enjoy!