Mooch the cat needs to find a birthday present for Earl the dog, who's already got everything. What's he going to do? He cunningly solves the problem by giving Earl nothing, wrapped up in a box with a pretty bow.
It's cute, though if I were going to be pedantic I might complain that the basic joke was ripped off from Hurra för pappa Åberg!
, which actually has a more elaborate version. But most likely Gunilla Bergström ripped it off in turn from Sophocles or one of those dudes. I can't believe that nobody before the twentieth century thought of this one.