Over the last few years, I've seen Instagram magnets all over the place, and thought they were SO cute. But they can be a little bit pricey, and on a trip to Michaels last year, I saw some magnet ...

Physics Girl is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, Amazon Fire TV, Amazon Fire Tablet, Roku, Samsung Smart TV, and ...