For whimsy that doesn't waste my time, my favorite recent example is when I ordered a giant gummy bear on a stick for my brother for Christmas (we have a candy gag gift tradition).

It was shipped in a box in a box, of course, and the outer box was padded with packing peanuts. When I opened the outer box, at the very top in the middle was one of those rubber monster finger tip puppets with the wiggly arms--chewing on a packing peanut. Made my day. If they were really smart, he'd have been chewing on something wit the company name on it, which I think would increase the chance that I would remember it now.