The linked bagel, with cream cheese.(GeorgeHart.com)

If breakfast is about starting the day right, then it should be more than just nutritious and delicious—it should be fun, too. In that spirit, scholar and sculptor George Hart presents the linked bagel, complete with a handy guide to how to do it yourself. (Hart draws the various points and lines on the bagel where you should cut; when you do it, though, you might want to leave your bagel unblemished, unless you have a particular jones for the taste of Sharpie.) Note how the extra surface area allows you to unguiltily increase your cream cheese intake. What Bart Simpson once said to his little sister Lisa, we now say to Mr. Hart: “I can’t believe it! You’ve actually found a practical use for geometry!”

Mathematically Correct Breakfast [GeorgeHart.com]