Our item is a Galton Board also known as the Galton box or quincunx or bean machine. It is a device invented by Sir Francis Galton to demonstrate the central limit theorem, in particular that with sufficient sample size the binomial distribution approximates a normal distribution. Among its applications, it afforded insight into regression to the mean or "reversion to mediocrity".
This tool can be used at school, during demonstration classes, on scientific picnics and in various research laboratories. It is a great way to explain how, from many fully random choices, a consistent and known pattern is obtained. It can be used to explain such concepts as the binomial distribution, the law of large numbers, regression to the mean, the normal distribution.
The object is made with a solid 1.8 cm wooden 40x80 cm board glued in beans and pins. All is covered by 0.5 cm transparent plexi. It weighs around 3-4 kilograms.
It comes with 400 metal balls for a demonstration (with a possibility for more after contacting me). Each board is made individually. I need about 2 weeks to create one. After that time, it will be shipped to you immediately.
If you have any questions, please feel free to contact me.