As it were…

I don’t have a ton of time, so I’ll be brief.  Looking directly at an eclipse is terrible for your eyes, but you can look at it through a small hole in something, typically a 3×5 card or something.  But anything will work.  You can also hold that thing with the hole just right above the right surface and it will cast the image on the eclipse on that surface.  Here’s a cool shot of that being done many many times at once.