Who remembers cereal box records? They were cardboard records on the back of the box or inside the box on a sheet of cardboard and you had to cut them out.
I remember the cereal box records. I think I did own the Archies and Bobby Sherman ones. Not the best stereophonic quality, but still a fun thing to get a kid to pester mom for that box of cereal at the grocery store.
I also remember 3D baseball cards in cereal boxes, too. Still have a few of those floating around my card collection.