Galton board simulator

A Galton board turns probability into something you can watch. Balls fall through rows of pegs, making a left-or-right deflection at each collision. One path looks chaotic; many paths together begin to form a recognizable distribution.

Play the interactive board

Open the PegFlux Galton Board and drop balls from different starting positions. The board is intentionally simple so you can focus on the collision pattern.

Why the middle fills up

There are many more combinations of left and right turns that end near the center than at the extreme edges. As the number of balls increases, the collection pattern tends to become more concentrated around the middle.

Galton board, bean machine and quincunx

These names are commonly used for closely related peg-board probability demonstrations. The visual idea is the same: repeated small random choices combine into a larger statistical pattern.

Game or simulation?

It can be both. Educational versions emphasize probability and distribution. Arcade versions add score bins, targets or risk/reward mechanics. PegFlux keeps the educational board separate from its arcade-style drop games.

Frequently asked questions

What does a Galton board demonstrate?

It demonstrates how many small left-or-right outcomes can combine into a distribution that concentrates near the center.

Is a Galton board the same as a bean machine?

The terms are commonly used for the same kind of peg-board probability demonstration.

Can I use the PegFlux Galton board on mobile?

Yes. The simulator is designed to work with touch input in a modern mobile browser.