Cheeky title. These metallic balls are 1 mm in diameter and they are inside a device called Galton Board - it's a smart thing about probabilities. https://galtonboard.com/
Used to love playing with this when I was a teacher!! Balls had to be contained as a trip hazard!! Bet nowadays the children only have this. https://www.mathsisfun.com/data/quincunx.html
Ok. Now my brain hurts. I followed the link provided by @30pics4jackiesdiamond and found myself surrounded by bell curves, probabilities and formulas. Yikes! My Dad was a math teacher, my mom was not. Apparently I take after my mother.
This is a very cool shot with excellent DOF. The idea of being able to find "the order embedded in the chaos" is most appealing at the current moment...
@cdcook48 sorry!! What I could never explain to the pupils was WHY it always worked out that way. Just shows that maths rules the univvers and language explains it!!