E=mc^2, probably the most famous equation in the world. It's profound implications and elegance are truly magnificent, and now you can have a reminder of this beauty every time you go to grab a frozen pizza from the freezer!
This super strong, large magnet would make a great gift for any science teacher or new graduate - or as a parting gift for a new college student of the sciences.
Available for purchase via: http://etsy.me/1GIbMnX

Just print out and insert two magnets! I'd recommend using a drop of superglue to make sure they stay put!