I mean, I have nothing against them. Certainly I'll eat a bowl of Rice Krispies on a Sunday morning (maybe with a banana cut up in it) but even for an advertisement with their habitual misleading, this is over the top.
It was June 1941. Those are some odd-looking and yet interesting little elves there, they remind me of children's book illustrations from the early 1900s. And nothing against the June Bride there listening to little men no one else can see, but I suspect the average husband of that era would look forward to pancakes, scrambled eggs or bacon when he sat down for breakfast. He's got a good heart if he squeezes out a grin and beams, "Why, honey. Thanks so much. I love a bowl of dry cold cereal with a few drops of milk under it and a cut up strawberry arranged artistically around the edge."