What are these things??

At some point don't cha think that somebody will ask you "Daddy, Mommy..what are these flat round things??" I saw these this past weekend while answering phones for the World's Largest Trivia Contest. An update in the world of "commercial" radio like WIFC..I can't tell you the last time I played a record. Used to use them and ONLY them. One of my favorite radio memories was when you had to put a coin on top of the tone arm..where the needle is..to give it enough weight to stay on the 45 or the album. And my ABSOLUTE favorite story is from when I worked at Tom Brokaw's station in Rapid City, South Dakota. Yes..I worked for Tom Brokaw..so very cool. I was working overnights and went out to check the Associated Press Wire Service out by the elevators. The door to the station closed behind me and I was locked out of the station!! On the air at that point I had just started playing side one of the album "Grand Illusion" by Styx..so I knew that there would be some music on-the-air for a while. But how do I get back in???  The station was on the 6th floor of a bank building!! So..I took the elevator down to pay phone and called the only guy whose number I knew on our staff that could get me back in. He arrived in about 15-20 minutes and we both rushed back in just as the album was finishing. So I jumped on and said "that was something new..side one of "Grand Illusion" from Styx..hope you liked it."