Free online games

Programming, chemistry, math, physics — interactive educational games for clever kids. Free, no sign-up.

• Chemistry Builder — Snap atoms into molecules and trigger chemical reactions. Start with water, end up in organic chemistry. (ages 10–14)
• Betting Academy — Bet coins on different events and find out whether you can estimate probability better than chance. (ages 10–14)
• Dungeon Explorer — Explore the dark depths, fight monsters and collect treasure. Clear 10 floors and escape! (ages 10–16)
• Dungeon Explorer 2 — A new take on the dungeon explorer. Explore the dark depths, fight monsters and pick your skills wisely. (ages 10–16)
• Tank Battle — Multiplayer tank battle. Upgrade your tank, buy abilities and dominate the arena! (ages 10–16)
• Shootout — Survive an arena full of players and zombies. Grab weapons, buy upgrades and become the top shooter! (ages 10–16)
• Fun Duel — A two-player arena shooter. Jump across platforms, grab power-ups and shoot your rival — first to 7 kills wins! (ages 10–16)
• Output Oracle — Read the Python code and guess what it prints. No running it — just your brain! (ages 10–16)
• Guess the Type — What data type does this Python expression have? int, float, str, list, bool... (ages 10–16)
• Reaction Time — How fast can you react? Click the moment the screen turns green! (ages 10–16)
• Stroop Test — The word says one color but is written in another. Click the INK color! Try 6 languages and compare scores. (ages 10–16)
• Snake — Eat food, grow and don't crash into yourself — or write code that controls the snake! (ages 10–16)
• Breakout — Smash bricks with a ball and paddle — or write code that plays for you! (ages 10–16)
• Pong — Classic Pong — play yourself or write code that beats the AI opponent! (ages 10–16)
• Asteroids — Shoot asteroids — or program an autopilot that handles it for you! (ages 10–16)
• Flappy — Can you fly through the pipes? Play yourself or write code that flies for you! (ages 10–16)
• 2048 — Slide tiles with the arrow keys. Equal numbers merge. Get to 2048! (ages 10–16)
• Sliding Puzzle — Slide the tiles into the right order. From 2×2 up to the classic 15-puzzle. (ages 10–16)
• Minesweeper — Uncover squares and avoid the mines. Three difficulties from easy to expert. (ages 10–16)
• Lights Out — Click a light to toggle it and its neighbors. Goal: turn them all off! 7 levels. (ages 10–16)
• Mental Math — 60 seconds, as many problems as you can. Addition, subtraction, multiplication — getting harder! (ages 10–16)
• Prime Hunter — Find every prime number in the grid! 60 seconds, points for each correct click. (ages 10–16)
• Binary Game — Flip bits (128, 64, 32...) to build a number in binary. 20 rounds! (ages 10–16)
• Hangman — Guess letters and save the stick figure! 35 Czech words from science and nature. (ages 10–16)
• Anagram — Scrambled letters — unscramble the right word! 10 words against the clock. (ages 10–16)
• Word Search — Find the hidden words in a grid of letters. Across, down and diagonally! (ages 10–16)
• Towers of Hanoi — Move the disks from peg to peg. A bigger one can never sit on a smaller one. Can you do it in the fewest moves? (ages 10–16)
• Mastermind — Crack the secret 4-color code. Black peg = right position, white = wrong position. (ages 10–16)
• Set! — Find trios of cards where each feature is either the same on all three, or different on all three. (ages 10–16)
• Memory — Flip cards and find the pairs. Solo or two-player! 4x4 or 6x6. (ages 10–16)
• Pixel Art — A 16x16 pixel editor. Pencil, fill, eraser, 12 colors. Create! (ages 10–16)
• Beat Mixer — Mix beats like a pro! A 16-step sequencer with presets, sharing and layering tracks one at a time. (ages 10–16)
• Color Mixing — Mix an RGB color to match the target. 10 rounds, scored on accuracy! (ages 10–16)
• Fractals — Infinite patterns from simple rules. Mandelbrot, Julia, Newton with draggable roots, trees, Koch, Sierpinski. (ages 10–16)
• Epidemic — How does a disease spread? Tweak infectiousness, lethality, vaccination and distancing. The SIR model in action. (ages 10–16)
• Evolution — Evolve species against three bots. Between seasons add traits, breed or split species. Goal: the most biomass or the most meat eaten. (ages 10–16)
• Sound Lab — Sound is a wave. Combine oscillators — sine, square, sawtooth — and hear the interference. (ages 10–16)
• Logic Deduction — Einstein's riddle! Use the clues to fill in the logic grid. Pure deduction, no guessing. (ages 10–16)
• Wave Canvas — Draw waves and see what image they form. Every point is a wave — try it and see what happens. (ages 12–16)
• Electrons — Visualize electron shells. Configurations, quantum numbers, Hund's rule — the first 20 elements. (ages 12–16)
• Block World — Explore an infinite world made of blocks. Mine resources, craft tools, build houses and survive a night full of monsters! (ages 10–16)
• Block World 3D — Explore an infinite 3D world of blocks! Mine, craft, build and survive the night — now in full 3D with a first-person view. (ages 10–16)
• RC Plane — Fly an RC plane with realistic flight physics. Take off from the runway, enjoy the view and try to land in one piece! (ages 10–16)
• Mosaic — Drag a tile's edges and watch the whole mosaic change in real time. (ages 10–16)
• Symmetry — A kaleidoscopic drawing tool — draw and watch your strokes mirror across the canvas. (ages 10–16)
• Sudoku — Fill the 9×9 grid with the numbers 1–9. No repeats in any row, column or box. (ages 10–16)
• Kakuro — Number crosswords. Fill the cells so the sums add up. No repeats within a run. (ages 10–16)
• Star Battle — Place stars in the grid. Every row, column and region has exactly N stars. Stars can't touch. (ages 10–16)
• Binox — Fill the grid with zeros and ones. No three of a kind in a row, equal counts in each row and column. (ages 10–16)
• Skyscrapers — Fill the Latin square. The numbers on the edge tell you how many buildings you see from that direction. (ages 10–16)
• Sorting Algorithms — Pick two sorting algorithms and guess which one is faster. Watch the race step by step! (ages 10–16)
• Gravity — Drop stars, planets and moons into space. Watch gravity pull them into orbits — or into collisions! (ages 10–16)
• Playing Scientist — You feed inputs into a secret system and observe the outputs. Can you figure out the rule? (ages 8–14)