Trackdle

Turn abstract probability and statistics concepts into visible, easy-to-understand content with fun interactive visual demos. Master core probabilistic thinking, and dive deep into classic theories including the Law of Large Numbers, Bayes' Theorem,

Free French word-guessing game! Play Wordle-style with 6 tries to crack the daily word, helping kids learn verb conjugations and noun genders actively through fun gameplay.

cpstest is a web-based tool for testing mouse click speed, evaluating concentration, measuring reaction speed, and providing fun, focused training.

Simple online tests for reaction time, memory, and focus

自动识别公开牌面、追踪剩余牌，支持斗地主、跑得快、掼蛋，提供 iOS 与 Android 版本。

Experience 3D moon block casting online: watch the two blocks fall naturally and check if you get a holy block, laughing block, or yin block.