Lab

Build a circuit. Grow a world. Watch an idea come alive. Twelve hands-on apps for curious minds, free to use in your browser. No sign-up, no ads.

Tools

• Science / Interactive sky atlas & astronomy study

  Space Observatory

  Explore 5,044 stars, all 88 constellations, our solar system and galaxies beyond. Follow study journeys, compare distances and keep an observing notebook.

  Good for Curious learners and stargazers exploring our place in the universe.

• Science / Interactive electronics workbench

  Circuit Playground

  Build with eleven components in 3D or a shared schematic. Explore how parts work, read resistor bands, test overloads and protect your circuit with fuses and breakers.

  Good for Curious builders learning how electricity flows.

• Science / Sound and ripple playground

  Wave Studio

  Mix two waves, move a ripple probe and measure interference. Compare a captured baseline, export data and hear an optional source mix.

  Good for Students and musicians exploring waves and interference.

• Technology / Interactive algorithm learning workbench

  Algorithm Arena

  Explore 14 algorithms across sorting, searching, pathfinding, dynamic programming, backtracking and scheduling. Edit a problem, predict the result and follow every decision.

  Good for Learners exploring algorithmic thinking and comparing strategies.

• Science / Living population experiment

  Evolution Sandbox

  Grow a population in changing environments. Food, energy, inherited traits and mutation shape every generation, with charts that reveal the results.

  Good for Anyone curious about inheritance and natural selection.

• Play / Physics construction playground

  Chain Reaction Builder

  Arrange ramps, dominoes, gears and pendulums to guide a ball to its goal. Run your machine, revise the design and save your creation.

  Good for Tinkerers who enjoy designing playful machines.

• Creative / Mandelbrot and Julia explorer

  Fractal Explorer

  Link Mandelbrot and Julia maps, then follow a point through the equation. Predict, step through its journey and compare the results.

  Good for Artists and explorers finding beauty in mathematics.

• Technology / Visual code execution lab

  Code Observatory

  Follow loops, decisions and helper functions in a connected 3D program map. Pick from 25 editable templates, watch values travel, and replay each step to see why it happens.

  Good for Beginners learning what a program does one step at a time.

• Creative / Color mixing and perception studio

  Color & Vision Lab

  Mix light and pigment, check text contrast and test visual illusions. Collect your discoveries in a palette you can save and export.

  Good for Designers and curious minds exploring color and perception.

• Science / 3D spacetime & gravity visualiser

  Warp

  Choose a solar system or build your own. Explore matching 2D and 3D views, change masses and velocities, and replay their orbits through Earth time.

  Good for Students and teachers explaining gravity, orbits and black holes.

• Explore / Illustrated character & story explorer

  Marvel Universe Atlas

  Find your next Marvel story. Search 130 characters, trace the relationships between your favourites, and share the stories you discover.

  Good for Fans and newcomers figuring out who's who and where to start reading.

• Learning / IELTS General Training practice

  Visa English Coach

  Build your English with focused practice, clear answer explanations and a chance to retry your mistakes. Keep your drafts, vocabulary and progress on your device.

  Good for Anyone preparing for IELTS General Training, especially for Australian visas.

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Rabbit holes

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