If you’ve got a few hours you want to burn, you must check this out. It’s the timeline of every song that’s been number one since 1958 (in America). It plays snippets and scrolls slowly forward replacing each number one with the next one. Fantastic!
I tried just letting it play but it bombed out a few times, so be warned. Although it starts in the 1990s when you first try it, you can easily spin it to any month and year you desire and just let it scroll forward. Or you can use the search facility. Fun for all ages!
Try it now: http://polygraph.cool/history/