You may have discovered the Guardian's excellent science blogs. They cover all sorts of weird and wonderful subjects. Today the blog post was written by Mark Lorch, the scientist who worked with me on the play and novel, 'Investigation: Haunted House'.
This is the link:
It was devised for Mark's son, Sebastian, who is mad on trains - so it is not too complicated or 'clever' - and there is a jargon buster, to explain any difficult vocabulary.
I've tried to upload the image, but failed miserably. Do have a look at it. If there are any students of chemistry reading this - it may even help you to remember relationships and symbols.
Good luck! :)