This is The Periodic Table of Visualization Methods; roll over any of the ‘elements’ to see a pop-up of an illustration in that particular style. Good reference, very clear, lots of information in a small space and excellent use of the specific medium – in this case, the web.
As an added bonus…
Breaking it down and spicing it up – Sid The Science Kid on PBS Kids:
I dare you to watch this and NOT be humming it 10 minutes later. Now that’s immediate impact.