I don't recall ever seeing something like this so I wanted to know what they look like. Here's a short video that shows a guy walking around looking for them.

I don't recall ever seeing something like this so I wanted to know what they look like. Here's a short video that shows a guy walking around looking for them. He also talks briefly about some uses he has for them. https://www.youtube.com/watch?v=6DOwMr_T4_A https://www.youtube.com/watch?v=6DOwMr_T4_A