All students should see it at some point in their studies. See the article '"Frames of Reference" revisited' by Alistair Steyn-Ross and Donald G Ivey, American Journal of Physics 60(12), 1069-1085, ...

Prop one up on your desk or mantel, plug it in, install an app, and you can have a stream of photos or videos from your camera roll rotating all day. Many frames also support having others ...