This is so charming I can’t stand it. You get the periodic table, and on each element, you can click to get a video with a little experiment on that element, performed by a guy with a cute British accent. Check it out — The Periodic Table of Videos.
Here is their YouTube channel.
Here’s Gallium (the Gallium “Beating Heart” experiment).
And Rubidium (certainly he doesn’t really wear his hair that way all the time!). They sure know how to keep you watching to wait for the hammer to fall, so to speak!