Calvin and Hobbes by Bill Watterson for March 11, 1989
Calvin: I'm home. I didn't get my propeller beanie today, did I? Mom: As a matter of fact, you did! Calvin: It's here! Ha ha! It took weeks and weeks of waiting, but at long last it's here! Now I finally, finally get to put it on! Calvin (reading): "Some assembly required. Batteries not included."