All Tools

Interactive cellular automaton — draw cells on a grid, place classic patterns, and watch them evolve by Conway's four simple rules.

Watch a row of pendulums drift out of sync into mesmerizing wave patterns, then snap back together in a hypnotic ~60-second loop.

Calculate weighted grade averages, semester GPA on a 4.0 scale, and find out what score you need on your final exam.

Fly through a 3D starfield screensaver with adjustable speed, density, and colors. Steer with your mouse, keyboard, or touch and warp through space.

Create multiple-choice and true/false quizzes, then play, save, or share them by link with automatic server-side scoring and a ranked leaderboard.

Watch the aurora borealis flow across a starry night sky. Pick color themes, adjust intensity and speed, add shooting stars and ambient wind sound.

Launch virtual fireworks with a click. Pick from 7 burst types, 5 color palettes, and scenic backgrounds, then run a 30-second grand finale.

Build a virtual fish tank in your browser. Add fish, sea creatures, and decor, then watch them swim, feed, and even hunt with lifelike behaviors.

Enjoy a cozy virtual fireplace with four visual styles, crackling fire audio, optional wind or rain ambience, and a sleep timer that fades out.

Watch mesmerizing wax blobs rise and fall in a virtual lava lamp with six color presets, custom colors, adjustable speed, and interactive touch.

Watch rain slide down a window with realistic droplets, soothing rain sounds, thunder, and beautiful scenes for relaxation, focus, and sleep.

Interactive falling sand game. Draw sand, water, fire, and walls and watch them fall and react. Tilt gravity with your mouse or phone.