Ours is pretty lame: we've just been randomly changing our backgrounds on MS Teams when we're on video calls. We still get a kick out of it though, which shows how nerdy we still are at our age.
If you're not familiar with the MS Teams feature I'm talking about, you're able to blur your background so others can see what's going on behind you (a very cool feature, actually) but recently they introduced a twist to this in that you can choose a custom background to show instead of a blur filter. One coach is a disc golf enthusiast so he uses pictures of really cool disc golf courses. I have a messy home office so I use an image of a big corner office on a high floor with full glass windows overlooking a city (yeah, I know, boring).