Boltz

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,

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

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。

Advanced AI education agent that builds a one-stop AI learning closed loop featuring "video lectures, in-class practice, and intelligent review"

A fun, challenging online number puzzle game where you slide tiles to experience the magic of math and the fun of strategy.

Free ancient poetry calligraphy practice sheets, a great helper for both handwriting practice and learning