Editor's Choice

Editor's ChoiceBuild an Atom V2Build any atom in 3D with your fingers. Snap protons, neutrons and electrons together, switch between Bohr shells and real orbital clouds, overload a nucleus and watch it decay, excite electrons to see each element's true colours of light, and collect all 118 elements through missions, a daily atom and quick quizzes. Includes a guided Tour and a screensaver.5-12

Editor's ChoiceUSA Map PuzzleMaster all 50 United States with this interactive puzzle featuring state names, capitals, and geographic regions.4-8

Editor's ChoiceGravity LabA sandbox universe running real Newtonian gravity. Drag to launch a planet and watch the orbit you are about to make before you let go, then bend the law itself — turn gravity off, make it fall off as 1/r³, add dark matter, or switch on Einstein and watch an orbit precess. 18 missions, 17 illustrated articles and quizzes where every question asks you to read a graph, a diagram or your own solar system.4-8

Editor's ChoicePlanet GenesisBuild a world from scratch. Pick a star, choose an orbit, pour in an atmosphere, spin it, and switch on a magnetic field — then find out what you actually made. Every choice is real physics: gravity, escape velocity, the greenhouse effect, the habitable zone. Throw an asteroid at it, stand on the surface and look at the sky, slice it open to the core, and collect all 24 kinds of world.4-8

Editor's ChoiceWord IntelligenceTrain your verbal intelligence with three word puzzle games. Find hidden connections, forge words, and decode context.All Grades

Editor's ChoiceTank ZoneFirst-person tank combat across four eras. Firing pauses the world on a question — answer fast for a heavy live shell, miss and it is a dud. Arcade, 1941, 1944, and the modern battlefield, powered by any T2M question set.All Grades

Editor's ChoiceAge of KnowledgeAn Age of Empires–style 3D real-time strategy game where gold is earned ONLY by answering quiz questions. Build farms, barracks and towers, train armies, advance through four Ages, and outlast your rivals — powered by any T2M question set.All Grades

Editor's ChoicePop Quiz DefenseA full-3D tower defense game where gold is earned ONLY by answering quiz questions. Pick from 8 battlefields, build and upgrade 20 tower types, and pop 20 kinds of invading balloons — powered by any T2M question set.All Grades

Editor's ChoiceRacing GameRace by answering questions or typing! Pick any subject and grade from the shared question bank (missed questions come back around until you get them), or race on typing passages — including text you paste yourself. Earn gold for accuracy, speed and placement, then spend it in the garage on 160+ cars across six tiers. Practice solo against AI ghosts or race friends live in a multiplayer lobby.All Grades

Editor's ChoiceClash of ClassroomsBuild your village, raise an army, and raid other players — but every coin of gold is earned by answering quiz questions. A full-3D base-builder with 20 troops, 20 defenses, clans, leagues and trophy leaderboards. Answer fast to fund the assault; wrong answers teach you the right one. Works with any T2M question set.All Grades

Editor's ChoiceGolf AcademyA gorgeous full-3D golf game where every shot starts with a quiz question — answer fast and correctly and your caddie marks the club, the line, and the sweet spot. 52 courses (22 world-famous classics + 30 wild fantasy worlds from the Moon to Candy Canyon), realistic wind, elevation, hazards and putting, with daily/weekly/all-time leaderboards.All Grades

Editor's ChoiceQuiz FighterA side-scrolling space shooter where the answers are the gates. Blast hostiles, collect capsules, then fly the correct gate to heal your hull. Powered by any T2M question set.All Grades

Editor's ChoiceUFO FilesX-COM-style turn-based tactics where correct answers power your squad's Action Points. Command agents across 60+ missions from the real UFO files — Roswell, Rendlesham, Phoenix Lights — photograph aliens, recover artifacts, befriend the friendly ones, unmask impostors, and build bases on a 3D globe while the newspapers deny everything.All Grades

Editor's ChoicePower Grid EngineerRun your own nuclear power plant and city grid in gorgeous 3D. Pull the control rods, watch real energy packets flow from the splitting atom through steam, turbine and wires to every home in town — then price your power, ride out heat waves, and (please) avoid the meltdown. Operator mode adds real reactor physics: decay heat, xenon poisoning, SCRAM and 60 Hz grid frequency.All Grades

Editor's ChoiceCinema AtlasAn explorable knowledge graph of 4,400+ notable films since 1970. Wander a living constellation of movies, actors and directors; scrub fifty years of cinema on a timeline; connect any two stars through their shared films in Six Degrees mode; and test yourself with 50 quiz sets built from real film data — every answer flies you to its spot in the atlas.All Grades

Editor's ChoiceCube SolverA studio-lit 3D puzzle cube with a real solving engine. Scramble it, twist it into any mess by hand, then watch it solve layer by layer — or turn on Tutorial Mode and learn to solve it yourself, one explained move at a time.All Grades

Editor's ChoiceColor StudioA relaxing coloring studio. Turn any picture — from our gallery or your own photos — into a line drawing, choose how detailed it should be, then color it with solids, gradients and patterns. Adjust hues, draw on top, and save or download your artwork.All Grades

Editor's ChoiceFlocksThree rules, and a sky full of starlings turns into a murmuration. Fly starlings, fish, geese, bats, locusts and fireflies across eight worlds, change one rule at a time, and watch order appear with nobody in charge.3-10

Editor's ChoiceUniverse AtlasA fully interactive 3D map of our galaxy and beyond, built on real data: 2,475 actual stars from the HYG catalog, the spiral arms, Sagittarius A*, famous nebulae and clusters, and the whole Local Group. Fly a guided tour, scrub a 24-billion-year timeline from the Big Bang to the Andromeda collision, watch supernovae seed new stars, and test yourself with 200 quiz questions that fly you to the answer.All Grades

Editor's ChoiceThe White HouseWalk the White House, built from the Library of Congress measured drawings. Explore the State Floor — the East Room, the Blue Room, the Cross Hall — and the working West Wing including the Oval Office, in a first-person walkthrough or a cutaway dollhouse overview. Hover any object for a fact; click for the full story with a link to Wikipedia. Tour the 18-acre grounds and the Rose Garden, then board Marine One from the South Lawn to fly to Joint Base Andrews and step aboard Air Force One in its 1962 livery. Every dimension is sourced; where the record is classified or withheld, the app says so.All Grades

Editor's ChoiceLunar LanderA modern cinematic remake of the 1970s terminal-descent classic. Land the Aurora on 6 worlds — Moon, Mars, Earth, Venus, Titan, Europa — then change the gravity and the air and see what that does to the burn. Soft, upright, on the lights.All Grades

Editor's ChoiceTreasure HuntersNavigate through maps, solve clues, and hunt for hidden treasures while learning geography and problem-solving skills.2-6

Editor's ChoiceArt History MuseumWalk a 3D museum of art history: a zoomable timeline of 18 periods and 90 masters, each with a first-person gallery hung with their real paintings — every image and word from Wikipedia.All Grades

Editor's ChoiceEngine LabOpen the hood of a working engine. Watch fuel, spark, and the four strokes, explode every part, then rebuild it as a diesel, a rotary, a hybrid, or an electric motor — and see what that does to power and to the fuel bill.6-8

Editor's ChoiceSolar System AtlasVisit every planet, moon, asteroid and comet with every size and distance true to scale. Fly a starship to any world, see its surface up close, and learn the facts and stories behind it.3-8

Editor's ChoiceHabitat ExplorerExplore living voxel worlds. Follow the great wildebeest migration across the Serengeti, take control of any animal, and watch how food, water, weather and evolution decide who survives.4-10

Editor's ChoiceGalaxy SimulatorCreate swirling galaxies with billions of stars. Watch cosmic collisions, black holes, and stellar evolution unfold.6-12

Editor's ChoiceEurope Map PuzzleExplore the European continent through an engaging puzzle experience featuring countries, capitals, and major landmarks.4-8

Editor's ChoiceSpace Explorer PuzzleJourney through the solar system with planets, moons, and celestial objects in this cosmic educational puzzle.3-10

Editor's ChoiceAI Image CreatorCreate stunning images using artificial intelligence. Describe what you imagine and watch it come to life.6+

Editor's ChoiceOcean Life PuzzleDive into the underwater world and discover marine creatures while assembling this beautiful ocean ecosystem puzzle.K-5

Editor's Choice3D Printer SimulatorExperience the magic of modern manufacturing! Design, configure, and operate a realistic 3D printer in this interactive simulation.

Editor's ChoiceBuild an AtomBuild any atom in 3D with your fingers. Snap protons, neutrons and electrons together, switch between Bohr shells and real orbital clouds, overload a nucleus and watch it decay, excite electrons to see each element's true colours of light, and collect all 118 elements through missions, a daily atom and quick quizzes. Includes a guided Tour and a screensaver.5-12

Editor's ChoiceEarth LabSimulate plate tectonics, erosion, and climate change. Explore Earth's geological history across millions of years.5–12

Editor's ChoiceLinguistic StudioExplore the building blocks of language. Analyze phonetics, grammar, and syntax through interactive exercises.6-12

Featured

Choose a JigsawBrowse thousands of beautiful jigsaw puzzles across every category and difficulty level. Pick your favorite and start solving!All

Atomic AssemblyBattle through elemental challenges while building atoms and molecules. Combine arcade action with chemistry education.5-12

Earth AtlasExplore the whole Earth in 3D, live: day and night, clouds and city lights, then drop down to any street with real terrain and 3D buildings. Wind the time machine, try seven hands-on labs, and fly a starship.6-12

PianoDigital audio workstation with piano roll, 80 synth sounds, MIDI import/export, and real-time particle visualizer.All

Quiz KartsA 3D kart racer where the quiz IS the race. Every 10 to 20 seconds a bank of answer gates spans the track, and the only way through at speed is the right answer — the wrong gate is a solid wall, and you restart from a dead stop while seven rivals stream past. Those rivals answer too, so the difficulty you pick is really how often they get it right: on Expert the field answers 92% correctly and out-driving them is not enough. Drift for mini-turbos, collect power-ups you can only open with a correct answer, and read the explanation while you dust yourself off.All Grades

ChessPlay chess against AI or friends with 2D and 3D boards, tutorials, puzzles, and multiplayer3-12

InfographicsExplore educational infographics on science, history, geography, and more.All

EvolutionFly four billion years of ancestry in 3D. Search any living thing — a whale, a mushroom, a T. rex — and watch the rest of the tree fall away to leave its lineage alone. Then press play: 51 real ancestors morph into one another as one continuous animal, from the first cell to today, while the clock counts down and the camera walks the branch. Ten deep-dive stories tell how a whale learned to swim, how a chicken descends from dinosaurs, and how a bat built a wing out of a hand — each with the fossil, the bone or the gene that settled it. A Bones view morphs one forelimb across seven species so you can see the same six bones become an arm, a wing, a flipper and a hoof. A DNA view lets you read a divergence date straight off a protein and check it against the fossils. 636 branches, 100 questions and 8 investigation cases.All Grades

Cities Through the AgesSeven real street corners, rebuilt once per era, from AD 250 to the year 3000. Pick a city and drag the timeline: the buildings, roofs, shopfronts, signs, traffic, clothes, water level, sky and air all change with the year, and every one of them is period-correct. London is the foot of London Bridge, where a crossing has stood within yards of one line since AD 50. Paris is the right bank at the Pont d’Iéna, where everything permanent on the axis has been demolished and the tower that was licensed for twenty years is still standing — watch it built, in twenty-six months, while you scrub. New York is Greenwich Street at Fulton, where the ground itself is younger than the buildings on it. Tokyo is the palace moat, the one piece of ground in the densest city on earth that nobody may build on. Rome is a road that has not moved while the ground rose twelve metres over it. Mexico City is a centre of power that never shifted, and Los Angeles is the plaza of 1781 under the freeway. Walk each street at eye level or orbit the whole block, and click the markers to read what you are looking at.All Grades

CrosswordCrosswords for every grade: thousands of K–12 puzzles by subject, classic newspaper crosswords and nine languages to learn — plus word search, fill-in, clue match, sprint and duo modes.All Grades

Fractal ExplorerDive into infinite patterns: zoom the Mandelbrot set all the way to 10³² and watch it turn into its own Julia set, fly through 3D Mandelboxes and Menger sponges, light up Buddhabrots, fractal flames and strange attractors, and grow trees, coral, snowflakes, lightning and sunflowers from a seed. Trace an orbit step by step, measure a fractal dimension, or let the screensaver play with calm music. 42 fractals in five rooms: Plane, Space, Living, Glow and Growth.6-12

Jigsaw QuizAnswer questions to build a jigsaw puzzle! Select question sets by grade and subject.All Grades

Flight TrackerExplore a recorded day of world aviation. Ride in the cockpit, take the controls, guide airport traffic, and learn the science of flight. Offline simulated traffic, aviation lessons, and a globe screensaver.All

Jigsaw ScreensaverWatch jigsaw puzzles assemble themselves. Perfect for relaxation or classroom displays.All Grades

SudokuChallenge your logical thinking with classic number puzzles. Multiple difficulty levels from beginner to expert.6+

New apps

Art History MuseumAll Grades

Scraps of MeaningAll Grades

Knowledge ExpressAll Grades

Millimeter WorldAll Grades

Build an Atom V25-12

Golden West RailwayAll Grades

Chemistry LabElementary, Middle School, High School

Algebra LabK-12

Alphabet & NumbersPreK-1

Monarch SanctuaryAll Grades

Living HistoryAll Grades

Adventures of Anne of Green GablesGrades 4–10

Dissection Lab3-12

Physics StudioK-12

Creature LabAll Grades

Technology Chain ReactionsAll Grades

Circuit StudioK-8

Math WorkshopPreK-5

Living AquariumAll Grades

Sandbox ScienceGrade 3+

Voxel Metro ZombiesAll Grades

Plant Explorer6-8

Subway SprintAll Grades

SparkQuestAll Grades

Popular

Choose a JigsawAll

USA Map Puzzle4-8

Linguistic Studio6-12

Atomic Assembly5-12

Build an Atom5-12

Habitat Explorer4-10

Galaxy Simulator6-12

Air & Mass Lab4-8

Gravity Lab4-8

Europe Map Puzzle4-8

Space Explorer Puzzle3-10

Racing GameAll Grades

Solar System Atlas3-8

AI Image Creator6+

Ocean Life PuzzleK-5

Every app87

Adventures of Anne of Green Gables

Choose a Jigsaw

Atomic Assembly

Build an Atom V2

Earth Atlas

USA Map Puzzle

Quantum Mechanics

Air & Mass Lab

Gravity Lab

Planet Genesis

Word Intelligence

Tank Zone

Nitro Kart

Age of Knowledge

Piano

Stumble Stampede

Math Workshop

Pop Quiz Defense

Racing Game

Voxel Metro Zombies

Algebra Lab

Clash of Classrooms

Golf Academy

Quiz Fighter

UFO Files

Power Grid Engineer

AgriCulture

Cinema Atlas

Cube Solver

Color Studio

Flocks

Universe Atlas

The White House

Lunar Lander

Reading Companion

Sandbox Science

Treasure Hunters

Art History Museum

Daily Proofreading

Engine Lab

Solar System Atlas

Quiz Karts

Daily Parts of Speech

Gemfall

Plant Explorer

Chess

Dinosaur Defense

Infographics

SparkQuest

Biosphere

Subway Sprint

Creature Lab

Evolution

Knowledge Express

Living Aquarium

Cities Through the Ages

Millimeter World

Orbit Lab

Technology Chain Reactions

Chemistry Lab

Living History

Lava Lamp Lab

Monarch Sanctuary

Alphabet & Numbers

Habitat Explorer

Crossword

Circuit Studio

Galaxy Simulator

Golden West Railway

Physics Studio

Dissection Lab

ArtCraft

Europe Map Puzzle

Scraps of Meaning

BioBlox

Space Explorer Puzzle

AI Image Creator

Ocean Life Puzzle

Fractal Explorer

3D Printer Simulator

Jigsaw Quiz

Flight Tracker

Jigsaw Screensaver

Build an Atom

Earth Lab

Sudoku

Linguistic Studio