Young kid builds and flies best Magnus Effect plane
 

I was quite amazed by this. I had never seen or even heard of a Magnus Effect plane until Finley showed up with what looked like an upside down lawn mower. He's a very articulate kid and talked me through the physics of how this thing works. It doesn't just work...it flies really well...and he built it totally from scratch. Quite looking forward to seeing what he comes up with next.

That is cool. Like an upside down flying lawn mower