There have been five monster-themed cereals from General Mills since 1971, four of which are represented in this box scan and giveaway toy ad. Here are some mid-to-late ’70s boxes for Count Chocula, Franken Berry, Boo Berry, and Fruit Brute.

And here’s a neat toy giveaway advertisement for Monster Bike Spinners from the back of the boxes. It was nothing more than a piece of plastic with a propeller that snapped onto your bike’s handlebars, really.