Dalton Demonstration Board is a visual teaching/demonstration device for probability distribution and statistical laws. It can visually demonstrate the formation process of the "Central Limit Theorem" and normal distribution. Real time observation of various probability distribution forms such as binomial distribution and Poisson distribution. Support users to customize the number of nail board layers, the number of dropped balls, and the width of the collection groove, quickly verifying the impact of different parameters on the results. Application scenarios: Probability and statistics, engineering mathematics, physics laboratory classes in universities; Data Science Training Camp, AI Beginner Workshop; Interactive exhibition area for science museums and science popularization bases; Enterprise Quality Management and Six Sigma Training.