RegexLearn

Learn CSS Flexbox through a fun frog-themed game. Complete 24 levels to master flexbox properties like justify-content and align-items.

Learn CSS Grid layout by tending a virtual garden. Water your carrots through 28 progressively challenging levels.

Animated visualizations of data structures and algorithms. Step through sorting, graph traversal, tree operations, and more at your own pace.

Kuakua.app is your AI-powered hub for mental health resources, mindfulness meditation, and positive psychology games. Take science-backed quizzes, play brain-boosting tasks, and unlock daily affirmations to feel happier, calmer, and more resilient—anytime, on any device.

Free browser-based science and math simulations from the University of Colorado Boulder. Over 150 interactive HTML5 simulations covering physics, chemistry, biology, earth science, and math — all usable directly in the browser with no account required.

Expert guides on low-risk investing strategies, ETFs, dividend stocks, and smart portfolio management. Trilingual content for conservative investors looking to grow wealth steadily.