I came across this website in my search for understanding Torsion Balances in how Columb used them in order to understand how charged particles interacted with one another.
There was a simulation of a Plinko Probability which I thought was pretty fun, and something one could make in real-life. I was thinking one could easily use the laser to make a board with holes in it for the dowels to go in and slots to attach bins at the bottom!
But to be honest, I just thought it was a pretty awesome website that a lot of folks on here would enjoy.