31.4% off select items | ThinkGeek
Graphic: Jillian Lucas

Itā€™s a day full of geekery. In honor of 3/14 aka Pi Day, ThinkGeek is taking 31.4% off 314 products. Grab clever t-shirts or a mug to show off your brainiac tendencies. Or stock up jewelry and accessories for the next birthday or anniversary or whatever.