I get antsy/fidgety while listening to podcasts (even interesting ones!), so I like to solve 5x5 Signpost while I listen. It's difficult enough to keep my finge

I get antsy/fidgety while listening to podcasts (even interesting ones!), so I like to solve 5x5 Signpost while I listen. It's difficult enough to keep my fingers occupied, but simple enough to not distract me from the content of the podcast.