Calvin and Hobbes by Bill Watterson for February 27, 1989
Calvin: Look at this, Hobbes! I could order an official chocolate frosted sugar bombs beanie! See, it has a battery powered propeller on top and a big star on the front! Isn't that neat? Hobbes: You have to send in four box "proof of purchase seals" to get it, it says. Calvin: Well, don't just stand there, or this'll take forever. Hobbes: Ugh, This stuff always makes my heart skip.