Ha ha. Oh, Family Circus... is there a joke in there? No, that's the whole thing. Uh... OK.
This was just one of a long series (including two installments in which one of the kids note that one of the parents enjoy the bench ride most of all. But those count as two different jokes, because they're two different parents). You can see the whole "hilarious" series posted by KentB3 over on mousebuzz.com.