Bell

you can’t predict one. you can predict them all.

a Galton board — pure randomness building the bell curve, every time

Every ball takes a genuinely random left-or-right turn at each peg, with no memory of the balls before it and no bias toward the middle, and yet pour enough of them through and the pile at the bottom always settles into the same bell shape. The order is invisible in any single ball's path — it only shows up once enough random paths are stacked together.

Concepts: probability, randomness.

An interactive you play with one thumb, on Wundr.