These were used in a game kids in Hawaii Used to play in the 60s and 70s. These are called POGS which are disks made of hard paper. It is similar to marbles
Additional info: POGS in the 60s were mostly milk caps . POGS- is also the abbreviation passion orange guava juice
Kids in my elementary school when I was a child, in the mid '80s, had pogs. I had a whole bunch. I don't know whatever happened to mine. They may be up in my parents' attic still. I may not be sure. I saw an auction on here earlier today with a whole bunch of pogs. Would love to get my hands on some of these again. I still think they are pretty flippin' kool.