Andrew Green, author of the excellent blog Who Wants Taters? mentioned Lucky Charms in a comment. And I just happened to have a box of them in the pantry, so of course Andrew INVOKING them like that was like giving me a posthypnotic suggestion. So yeah, I just had a bowl of Lucky Charms.
I used to like these when I was a kid. It seems that Dry Crumbly Marshmallow technology has come a long way since then. Most of the marshmallow back then were white or, at best, some kind of solid color. Nowadays, though... check it out, that's a rainbow!
I just noticed a minute ago that the cereal shapes are pretty interesting. I think they might be Satanic. Or they might be the result of an industrial accident at the Alpha-Bits factory. I'm sure that one of those scenarios would work.