Thanks to Phil Pollard for these links to A Gallery Of Terrible (Or Amazing) Cereal Boxes and its sequel, 25 More Terrible (Or Awesome) Breakfast Cereals. I actually tried a few of these…OKs, because Yogi Bear was selling them for a while, and Rice Krinkles because I was too lazy to spoon the sugar onto my Rice Krispies and this was the same thing, only pre-sugared. Most of 'em, I never heard of — in some cases because they were test-marketed only, and somewhere other than Los Angeles.
I used to try new cereals often but at some point they got too sugar-oriented even for me. They were selling them like candy you could pass off as a breakfast cereal on some technicality. Eventually, I realized that while I liked a lot of different cereals, I didn't like any of them better than Cheerios. So for about the last twenty years, it's been Cheerios or the occasional box of Rice Chex, both eaten sans milk or sugar. I cruise the cereal aisle often though and admire the ingenuity and sheer fun they have there.