Knock Knock is doing a Presidents’ Day sale this week — with free stuff! :) All orders of $30 or more will get $20 of mystery swag that KnockKnock picks. Use coupon code KK4PREZ by Monday, February 20, 2012.

Knock Knock is the brand behind the snarky post-its and epically funny notepads (& the super-useful “All Out Of” shopping notepads). Happy shopping!