The way it works in the paper magazine is that the image is printed on a single page, and you receive it unfolded like any other page. (That's why there are ins

The way it works in the paper magazine is that the image is printed on a single page, and you receive it unfolded like any other page. (That's why there are instructions on the top right about how to fold it. If it came pre-folded, you wouldn't need those instructions.) So the format of the joke as used in the magazine is that you see the unfolded version first. Anyway, in the one you're talking about, if you read the top-center text, it talks about what the artist gets to do for his birthday. As he blows out the candles on the cake, he wishes he could spend his birthday on the beach. The joke is that he actually celebrates it by trying to think of something to draw, i.e. he has to work.