A reader writes: For your inner geek …

My wife Karen and I are working through “we make the road…” which, with some of your other books, advocates using candles during spiritual exercises.
Alan Alda, the actor, has an inner geek too. He funded a contest a few years ago to answer the question “what makes a flame?” in a way a 10-12 year old could understand.
Here is winning entry, https://vimeo.com/40271657. I think your blog readers might enjoy it too.