Interactive exploration
Machines & MotionHydraulic brakes
How does a little lever stop a spinning wheel?
Squeeze a hydraulic brake. See inside the caliper, change piston sizes, and discover how pressure becomes force.
Energy & change
Follow energy as motion is transferred, stored, or dissipated.
Background on this idea
Interactive explorationComputers, 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.
Interactive explorationSpace & 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.
Interactive explorationElectricity & 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.
Interactive explorationEarth, 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.
Interactive explorationChemistry & 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.
Interactive explorationChemistry & 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.
Interactive explorationElectricity & 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.
Interactive explorationEveryday 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.
Interactive explorationElectricity & 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.
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 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.
Interactive explorationEarth, 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 explorationMachines & 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.
Interactive explorationMachines & 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.
A small distance.
A big internal pull.Explore the elbow’s leverage
Interactive explorationA big internal pull.Explore the elbow’s leverage
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.
Interactive explorationCells, 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.
Interactive explorationBody & 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.
Interactive explorationEveryday TechnologyRefrigerators and heat pumps
How does a fridge move heat out of a cold space?
Look through a cold room and follow its refrigerant loop. Count the heat removed and the work added, then try putting both sides in the same room.
Interactive explorationEveryday TechnologyInsulation and heat transfer
How can insulation keep warmth in—and heat out?
Open a house wall. Swap its added layer, make it thicker, and reverse the temperatures to see why insulation helps in winter and summer.