Celebrate Pi Day With Our $14.99 T-Shirt Sale!
*Promotional coupon only valid on regular priced t-shirts. Starts now and expires on March 14, 2012, at 11:59pm EST. Not valid with hoodies, magazine subscriptions, package deals, clearance, previously ordered items, in combination with other coupon codes, or online gift certificates. Mental Floss, Inc. reserves the right to change or cancel this coupon at any time without notification.