Investigate a virtual garden. Change who receives an assignment card, uncover a hidden starting difference, run fair trials and discover why a pattern alone cannot settle what caused it.

3D garden & causal experimentsExplore at your own pace

#correlation #causation #experiments #confounding

Interactive exploration

Computers, Networks & AILanguage models and AI text

Where does a language model’s next token come from?

Open a genuinely trained miniature Transformer. Change token tiles, inspect real attention and vector calculations, sample a continuation, and test the limits of a confident prediction.

Trained model & vector teardownExplore at your own pace

#language models #AI #tokens #transformers

Interactive exploration

Computers, Networks & AIMachine learning and training

Can a machine learn the wrong pattern?

Train a real classifier on editable inspection cards. Reveal a confident mistake, repair a misleading shortcut, and freeze your model before opening its reserved test.

Trainable model & experimentsExplore at your own pace

#machine learning #AI #data #classification

Interactive exploration

Computers, Networks & AICPUs and computer instructions

How does a CPU turn instructions into results?

Write a tiny real assembly program, watch values move through a processor’s logical parts, and stop at the instant an answer becomes stored state.

3D model & experimentsExplore at your own pace

#CPU #computers #processors #programming

Interactive exploration

Computers, Networks & AITransistors and electronic switches

How does an insulated gate control a current?

Inspect a connected CMOS cutaway, build a channel, find a circuit’s operating point and follow the charge and energy behind a changing bit.

3D model & experimentsExplore at your own pace

#transistors #electronics #semiconductors #logic

Interactive exploration

Space & AstronomyBlack holes and light

If a black hole traps light, what are we actually seeing?

Inspect the real EHT observation, then choose a direction in a calculated light map. Follow its exterior path, find its source and reveal two images of one tiny patch.

3D model & experimentsExplore at your own pace

#black holes #light #gravity #relativity

Interactive exploration

Space & AstronomyRockets and propulsion

How can a rocket move when there is no air to push against?

Open a generic engine, follow what it carries and keep every bit of expelled mass in the story. Change who measures the motion, balance the thrust terms and discover what staging actually changes.

3D model & experimentsExplore at your own pace

#rockets #momentum #propulsion #space

Interactive exploration

Space & AstronomyOrbits, satellites and gravity

How can falling keep a spacecraft above the ground?

Draw a velocity arrow, predict a path and compare two spacecraft on one clock. Follow a real NASA Earth map, inspect the next moment of free fall and discover why speed alone cannot make a circle.

3D model & experimentsExplore at your own pace

#orbits #gravity #satellites #free-fall

Interactive exploration

Electricity & EnergyNuclear fission and electricity

How does splitting an atom help make electricity?

Look through a power plant, follow three separate water routes and trace energy across their walls. Balance the energy account, then investigate why a growing average can still hide empty trials.

3D model & experimentsExplore at your own pace

#nuclear-fission #electricity #reactors #heat-transfer

Interactive exploration

Earth, Weather & ClimateEarthquakes and seismic waves

How can three stations help locate an earthquake?

Watch waves emerge from a buried source, pick synthetic arrivals and reveal the location one clue at a time. Test the clocks, depth and velocity assumptions—and compare the model with real recorded evidence.

3D model & experimentsExplore at your own pace

#earthquakes #seismic-waves #seismology #P-waves

Interactive exploration

Cities & TransportBridges, loads and structural strength

How does a bridge carry a moving load?

Move a load across an inspectable steel truss. Lift its deck, catch a diagonal changing from push to pull, repair a missing restraint and follow forces all the way to the supports.

3D model & experimentsExplore at your own pace

#bridges #truss #tension #compression

Interactive exploration

Earth, Weather & ClimateThe greenhouse effect

How can a planet warm without receiving more sunlight?

Freeze two model temperatures, change infrared transfer and release time. Follow every energy route, move the accounting boundary and compare the model with real atmospheric evidence.

3D model & experimentsExplore at your own pace

#greenhouse-effect #infrared #energy-budget #climate

Interactive exploration

Chemistry & MaterialsAcids, bases and the pH scale

Why is one step on the pH scale a big change?

Compare a hundredfold difference, transfer a tiny aliquot, turn a virtual burette and uncover why a weak acid and a strong acid reach different pH values at equivalence.

3D model & experimentsExplore at your own pace

#pH #acids #bases #logarithms

Interactive exploration

Chemistry & MaterialsSolids, liquids, gases and phase changes

Where does energy go while ice melts?

Give water an energy budget. Watch its temperature and phase masses, catch a melting plateau, compare two starting states and inspect an open ice structure.

3D model & experimentsExplore at your own pace

#states-of-matter #water #ice #melting

Interactive exploration

Chemistry & MaterialsAtoms and chemical elements

What makes carbon different from oxygen?

Change particle counts, pin the differences, and discover what names an element. Then prepare one-electron hydrogen states, collect possible position outcomes and match energy gaps to light.

3D model & experimentsExplore at your own pace

#atoms #elements #isotopes #electrons

Interactive exploration

Brain & SensesSleep and the body clock

Why do time awake and time of day both matter for sleep?

Change a fictional sleep history, catch the moment two curves meet, and separate a local clock change from a biological clock. Then follow light information from eye to brain.

Interactive model & evidenceExplore at your own pace

#sleep #circadian-rhythm #body-clock #light

Interactive exploration

Body & HealthVaccines and immune memory

What can a vaccine leave behind after its ingredients are gone?

Open a protein-vaccine example, build a response with traceable cell lineages, and compare later encounters. Then follow the separate route from vaccine mRNA to a protein.

3D model & experimentsExplore at your own pace

#vaccines #immune-memory #antigen #antibodies

Interactive exploration

Body & HealthThe immune system

How does a tiny intruder set a whole response in motion?

Explore how the immune system responds to an infection. Follow immune cells from skin to lymph node, inspect an antibody structure, and discover what immune memory leaves ready.

3D model & experimentsExplore at your own pace

#immune-system #antibodies #white-blood-cells #lymph

Interactive exploration

Brain & SensesNeurons and nerve signals

How does a nerve cell send a message?

Nudge a membrane, discover when a spike appears, test its recovery, and cross a chemical synapse. Then inspect a real potassium-channel structure.

3D model & experimentsExplore at your own pace

#neurons #nerves #action-potential #synapse

Interactive exploration

Electricity & EnergyBatteries and charging

What happens when you charge your phone?

Look through a phone, separate a battery’s layers, and trace two different journeys. One happens inside the cell. The other powers the world outside.

3D model & experimentsExplore at your own pace

#batteries #lithium-ion #charging #electrons

Interactive exploration

Everyday TechnologyMicrowave ovens and heating

Why is one bite hot while the next is cold?

See through a closed microwave, follow a bite around the turntable, and compare where energy arrives with where heat spreads afterward.

3D model & experimentsExplore at your own pace

#microwaves #heating #conduction #turntables

Interactive exploration

Brain & SensesEyes and vision

How does your eye bring the world into focus?

Open a sourced 3D eye, move a target nearer, and catch the moment its light comes together. Then discover why a smaller pupil is different from better focus.

3D model & experimentsExplore at your own pace

#eyes #vision #light #focus

Interactive exploration

Cities & TransportAirplane wings and lift

How can a wing turn moving air into lift?

Run a virtual wind-tunnel test. Tilt a symmetric airfoil, probe both surfaces, and build the whole lift force from pressure around the wing.

3D model & experimentsExplore at your own pace

#flight #wings #airflow #lift

Interactive exploration

Machines & MotionCar differentials and transmissions

How do driven wheels take different paths around a corner?

Follow a transparent car around a bend, open its rear axle, and discover how a differential shares motion, torque and a low-grip limit.

3D model & experimentsExplore at your own pace

#differential #gears #cars #torque

Interactive exploration

Electricity & EnergySolar panels and photovoltaic cells

Why does a solar panel’s power depend on what you connect?

Connect a realistic module to a virtual load, look inside a silicon cell, and build a day’s energy from changing light and time.

3D model & experimentsExplore at your own pace

#solar #photovoltaics #silicon #electricity

Interactive exploration

Cells, Life & EvolutionDNA, genes and proteins

How does DNA help a cell build a protein?

Take apart a human ribosome, follow a message three letters at a time, then change a DNA base and discover what the peptide does.

3D model & experimentsExplore at your own pace

#dna #rna #ribosome #proteins

Interactive exploration

Body & HealthKidneys and urine

How do kidneys keep useful things while making urine?

Inspect real urinary anatomy, follow a glucose marker out of blood and back again, and discover three different crossings with a ledger that never loses a marker.

3D model & experimentsExplore at your own pace

#kidneys #nephron #urine #filtration

Interactive exploration

Electricity & EnergyElectric circuits

What does it take to turn on a light?

Close a switch. Follow a complete path. Give current a second route and discover what changes.

Interactive model & diagramsExplore at your own pace

#circuits #current #voltage #resistance

Interactive exploration

Machines & MotionElectric motors

How does electricity make a motor spin?

Power a motor. Reverse its direction. Add a load and watch speed, current and turning force find a new balance.

3D cutaway & experimentExplore at your own pace

#motors #magnetism #current #torque

Interactive exploration

Body & HealthThe heart and blood circulation

Where does your blood go after a heartbeat?

Turn a real anatomical model in your hands. Reveal its chambers, meet the four valves, then follow the blood moving through both sides of the heart.

Interactive model & diagramsExplore at your own pace

#heart #circulation #valves #blood

Interactive exploration

Body & HealthLungs and breathing

How do your lungs pull in a breath?

Move through a breath, connect space to airflow, then cross the tiny boundary where oxygen enters the blood.

Interactive model & diagramsExplore at your own pace

#lungs #breathing #diaphragm #oxygen

Interactive exploration

Physics, Light & SoundLenses and focusing light

Why does moving a lens bring things into focus?

Slide an object toward a lens. Follow the rays, find a sharp image, and discover the moment a camera becomes a magnifier.

Interactive model & diagramsExplore at your own pace

#light #lenses #optics #camera

Interactive exploration

Brain & SensesHearing and the ear

How does a sound reach your brain?

Start with a vibration. Follow air, eardrum, tiny bones and hair cells, then see why the message reaching your brain is a different kind of signal.

Interactive model & diagramsExplore at your own pace

#sound #hearing #waves #frequency

Interactive exploration

Computers, Networks & AIThe internet and data packets

How does a message find its way across the internet?

Send “SMALL IDEAS!” through a network. Delay a piece, lose another, and watch what the receiver can actually use.

Interactive model & diagramsExplore at your own pace

#internet #networks #packets #TCP

Interactive exploration

Earth, Weather & ClimateThe water cycle

Where can a drop of rain go next?

Follow water above and below the surface. Pave part of the land, change evaporation, and watch the water budget rearrange.

Interactive model & diagramsExplore at your own pace

#water #earth #weather #watershed

Interactive exploration

Math, Probability & SystemsProbability and random patterns

How can random choices make a predictable shape?

Release a few virtual balls, then a thousand. Change the chance of a right turn and compare the results with a mathematical prediction.

Interactive model & diagramsExplore at your own pace

#probability #randomness #statistics #distribution

Interactive exploration

Machines & MotionFour-stroke engines

How does a piston turn fuel into motion?

Open a detailed engine, turn its crank, and take the assembly apart. Follow four different jobs hidden inside two very similar-looking turns.

3D working model & experimentExplore at your own pace

#engines #pistons #crankshaft #combustion

Interactive exploration

Machines & MotionLevers, pulleys and lifting

How can a small pull lift a heavy load?

Rerig a dock crane. Pull the same length of rope, watch the crate rise, and see what you trade for an easier lift.

3D working model & experimentExplore at your own pace

#pulleys #levers #lifting #work

A small distance.
A big internal pull.Explore the elbow’s leverage

Interactive exploration

Body & HealthMuscles, joints and movement

Why can holding a small weight need a big muscle force?

Move a load closer to an elbow on a transparent teaching arm. See the force change, then explore how muscles can work without visible movement.

3D working model & experimentExplore at your own pace

#muscles #joints #biomechanics #tendons

Interactive exploration

Computers, Networks & AIBinary numbers and logic gates

How do zeros and ones become a calculation?

Flip real input bits on a little calculator. Build a result from simple rules, and follow a carry as it crosses four columns.

Interactive logic workbenchExplore at your own pace

#binary #logic #computers #arithmetic

Interactive exploration

Physics, Light & SoundFloating, sinking and buoyancy

How can a heavy ship float?

Load a tiny barge and watch its waterline rise along the hull. Then lower a block through a tank to connect water pressure with buoyancy.

3D working model & experimentExplore at your own pace

#buoyancy #boats #density #displacement

Interactive exploration

Cells, Life & EvolutionPhotosynthesis and plant growth

Where does a plant get the material to grow?

Open a leaf, explore a chloroplast, and supply a tiny carbon-building recipe. Discover what comes from air, what comes from water, and what light contributes.

3D working model & experimentExplore at your own pace

#plants #carbon #photosynthesis #chloroplasts

Interactive exploration

Body & HealthDigestion and food

What happens to food after you swallow it?

Follow a meal through the gut, then zoom into its lining. Choose starch, protein or long-chain fat and discover why their next routes differ.

3D working model & experimentExplore at your own pace

#digestion #food #intestines #nutrients

Interactive exploration

Space & AstronomyMoon phases and eclipses

Why does the Moon seem to change shape?

Move the Moon around Earth and compare two viewpoints at once. Make a crescent, then tilt the orbit to discover why an eclipse is a special alignment.

3D working model & experimentExplore at your own pace

#moon #astronomy #sunlight #phases