Finish your holiday shopping in the Mental Floss Store. Use the code CYBERMONDAY at checkout and get 35% off t-shirts, books, mugs, games, tote bags, hoodies, and more. 

You can pay with your Amazon account, PayPal account, or credit card. To use a credit card, select "PayPal" at checkout and on the next screen click "Pay with Debit or Credit Card." 

Now go grab a tee for everyone on your list!