https://explorehall.com/en/Working 3D models of clocks, engines, locks and other machines. Turn them, slow them down, look inside, and read how each one works.enTue, 27 Oct 2026 00:00:00 GMThttps://explorehall.com/en/how/airplane-wing/https://explorehall.com/en/how/airplane-wing/Tue, 27 Oct 2026 00:00:00 GMTAn airplane wing changes airflow and pressure to create lift. Adjust angle of attack, airspeed and flaps in a wind tunnel and compare flow and forces.https://explorehall.com/en/experience/asteroid-impact/https://explorehall.com/en/experience/asteroid-impact/Tue, 27 Oct 2026 00:00:00 GMTHow are impact craters formed? Pick an asteroid's size, material, speed and angle, watch it cross the air, and see the crater, fireball and blast rings it leaves on 3D terrain.https://explorehall.com/en/walk/coral-reef-walk/https://explorehall.com/en/walk/coral-reef-walk/Tue, 27 Oct 2026 00:00:00 GMTSee coral bleaching causes in a 3D reef: raise the water temperature, follow NOAA heat stress levels and inspect a coral polyp at 100 times its size.https://explorehall.com/en/follow/cpr-firstaid/https://explorehall.com/en/follow/cpr-firstaid/Tue, 27 Oct 2026 00:00:00 GMTFollow adult and infant CPR, AED pads, choking and a fire extinguisher step by step to the 2025 guidelines, and test your rate in a rhythm game.https://explorehall.com/en/how/crispr/https://explorehall.com/en/how/crispr/Tue, 27 Oct 2026 00:00:00 GMTHow does CRISPR-Cas9 work, step by step? In 3D, Cas9 slides along DNA to a PAM, its guide pairs with 20 letters, both strands are cut and bacteria beat viruses.https://explorehall.com/en/walk/deep-sea-walk/https://explorehall.com/en/walk/deep-sea-walk/Tue, 27 Oct 2026 00:00:00 GMTSwim to the bottom of the Mariana Trench in a 3D ocean with 113 animals, following changing light and pressure down to a depth of about 10,935 m.https://explorehall.com/en/how/differential/https://explorehall.com/en/how/differential/Tue, 27 Oct 2026 00:00:00 GMTSee how a differential works in a car by steering a 3D open differential, comparing wheel speeds and watching what happens with one wheel on ice.https://explorehall.com/en/walk/dinosaur-walk/https://explorehall.com/en/walk/dinosaur-walk/Tue, 27 Oct 2026 00:00:00 GMTTry a dinosaur size comparison to humans in a 3D park with 137 dinosaurs and 35 other prehistoric animals, using a person and bus for scale.https://explorehall.com/en/how/disc-brake-abs/https://explorehall.com/en/how/disc-brake-abs/Tue, 27 Oct 2026 00:00:00 GMTPress the brake pedal in 3D and follow the force from foot to pads. Switch ABS off, change the road surface and compare wheel lock and stopping distance.https://explorehall.com/en/how/dna-replication/https://explorehall.com/en/how/dna-replication/Tue, 27 Oct 2026 00:00:00 GMTSee how DNA replication works step by step at a 3D fork: pull the helicase, pair the next base yourself and watch Okazaki fragments form and join.https://explorehall.com/en/how/elevator/https://explorehall.com/en/how/elevator/Tue, 27 Oct 2026 00:00:00 GMTHow does an elevator work? Be the operator of a 3D lift, drag the counterweight and passengers, race three algorithms, then cut the ropes.https://explorehall.com/en/how/four-stroke-engine/https://explorehall.com/en/how/four-stroke-engine/Tue, 27 Oct 2026 00:00:00 GMTA four-stroke engine needs two crankshaft turns for intake, compression, power and exhaust. Slow the cutaway to follow the valves, piston and pressure.https://explorehall.com/en/how/gps/https://explorehall.com/en/how/gps/Tue, 27 Oct 2026 00:00:00 GMTGPS finds position by timing satellite signals and solving for clock error. Change satellite count, clock error and relativity to see the map dot move.https://explorehall.com/en/how/gyroscope/https://explorehall.com/en/how/gyroscope/Tue, 27 Oct 2026 00:00:00 GMTA spinning gyroscope precesses as gravity changes its angular momentum. Change the spin, compare torque vectors and stop the wheel to see it fall.https://explorehall.com/en/how/hanok/https://explorehall.com/en/how/hanok/Tue, 27 Oct 2026 00:00:00 GMTTake apart timber joints in a hanok, light the ondol fire and follow heat under the floor. Change the eaves and date to compare sunlight in the room.https://explorehall.com/en/how/horse-gait/https://explorehall.com/en/how/horse-gait/Tue, 27 Oct 2026 00:00:00 GMTHow does a horse run? Watch a 3D horse walk, trot, canter and gallop, then compare the gaits of 20 animals, from camels to cheetahs, with footfall diagrams and tasks.https://explorehall.com/en/how/human-eye/https://explorehall.com/en/how/human-eye/Tue, 27 Oct 2026 00:00:00 GMTHow the eye focuses on near and far objects, in 3D: drag the lens, see the blur a myopic or ageing eye sees, fit glasses and find your blind spot.https://explorehall.com/en/how/lithium-ion/https://explorehall.com/en/how/lithium-ion/Tue, 27 Oct 2026 00:00:00 GMTCharging moves lithium ions into graphite while electrons travel through the wire. Switch charge and discharge, inspect the cell and build a battery pack.https://explorehall.com/en/how/manual-gearbox/https://explorehall.com/en/how/manual-gearbox/Tue, 27 Oct 2026 00:00:00 GMTA 3D cutaway five-speed manual gearbox. Change gear to watch a synchro ring match speeds in slow motion, and see why a shift without the clutch grinds.https://explorehall.com/en/how/mechanical-clock/https://explorehall.com/en/how/mechanical-clock/Tue, 27 Oct 2026 00:00:00 GMTA longer pendulum swings more slowly, making a pendulum clock lose time. Adjust length, temperature and latitude, then compare escapements and daily error.https://explorehall.com/en/how/mechanical-watch/https://explorehall.com/en/how/mechanical-watch/Tue, 27 Oct 2026 00:00:00 GMTA working 3D watch movement with no battery: wind the crown, stop the balance wheel with a finger, and see heat, gravity and magnets change the daily error.https://explorehall.com/en/experience/microwave-oven/https://explorehall.com/en/experience/microwave-oven/Tue, 27 Oct 2026 00:00:00 GMTThe magnetron produces the microwaves that cook food. Look inside the oven, heat a layer of cheese and compare hot spots with the turntable on or off.https://explorehall.com/en/experience/monty-hall/https://explorehall.com/en/experience/monty-hall/Tue, 27 Oct 2026 00:00:00 GMTTest why you should switch doors in the Monty Hall problem by playing with 3 to 100 doors and comparing switching with staying over 10,000 games.https://explorehall.com/en/how/moon-phases/https://explorehall.com/en/how/moon-phases/Tue, 27 Oct 2026 00:00:00 GMTMoon phases show how much of the sunlit half we can see, not Earth’s shadow. Move the date in 3D to compare crescents, full moons and eclipse alignments.https://explorehall.com/en/experience/optical-illusions/https://explorehall.com/en/experience/optical-illusions/Tue, 27 Oct 2026 00:00:00 GMTOptical illusions change how equal tiles or bars appear in context. Read the grey values, mask the surroundings and change your view of an Ames room.https://explorehall.com/en/follow/origami-crane/https://explorehall.com/en/follow/origami-crane/Tue, 27 Oct 2026 00:00:00 GMTFold a paper crane in 30 moves, step back through reverse folds and unfold the finished bird. Show crease marks and separate layers to follow each fold.https://explorehall.com/en/experience/piano/https://explorehall.com/en/experience/piano/Tue, 27 Oct 2026 00:00:00 GMTWatch one grand piano key in slow motion as the jack throws the hammer and lets go, then play the keyboard and see each note's frequency worked out.https://explorehall.com/en/how/pin-tumbler-lock/https://explorehall.com/en/how/pin-tumbler-lock/Tue, 27 Oct 2026 00:00:00 GMTSee how a pin tumbler lock works inside a 3D cutaway, comparing the right key with a wrong one and watching each pin meet or cross the shear line.https://explorehall.com/en/how/pulley-hydraulics/https://explorehall.com/en/how/pulley-hydraulics/Tue, 27 Oct 2026 00:00:00 GMTLift a crate with one to six rope parts and a car with a hydraulic jack in 3D. Change rope count or piston size and watch force, distance and work.https://explorehall.com/en/experience/reaction-time/https://explorehall.com/en/experience/reaction-time/Tue, 27 Oct 2026 00:00:00 GMTTest your reaction time to light, sound and choices in milliseconds, then follow the signal from eye to finger in 3D and see what your screen adds.https://explorehall.com/en/how/robot-arm/https://explorehall.com/en/how/robot-arm/Tue, 27 Oct 2026 00:00:00 GMTA 3D six-axis industrial robot arm. Drag the target to watch inverse kinematics set every joint, and see the wrist singularity and a cobot speed limit.https://explorehall.com/en/how/seasons/https://explorehall.com/en/how/seasons/Tue, 27 Oct 2026 00:00:00 GMTEarth’s tilt changes Sun height and day length, causing the seasons. Choose a date and latitude to compare daylight and how sunlight spreads on the ground.https://explorehall.com/en/how/ship-buoyancy/https://explorehall.com/en/how/ship-buoyancy/Tue, 27 Oct 2026 00:00:00 GMTLoad a container ship in a 3D water tank, switch from sea to fresh water, then tip it over and see how G, B, M and GM decide whether it comes back.https://explorehall.com/en/how/solar-panel/https://explorehall.com/en/how/solar-panel/Tue, 27 Oct 2026 00:00:00 GMTZoom from a rooftop solar panel into one silicon cell. Change sun height, tilt, heat and shade, then watch the watts, bypass diode and inverter respond.https://explorehall.com/en/how/tides/https://explorehall.com/en/how/tides/Tue, 27 Oct 2026 00:00:00 GMTHow do tides work? A 3D Earth, Moon and Sun with the tidal bulges drawn to a stated stretch. Move the date and hour to see high water, spring tides and neap tides change.https://explorehall.com/en/experience/touchscreen/https://explorehall.com/en/experience/touchscreen/Tue, 27 Oct 2026 00:00:00 GMTA touchscreen detects how your finger changes the electric field in an electrode grid. Pull the screen layers apart and press the test grid to see readings.https://explorehall.com/en/how/tower-crane/https://explorehall.com/en/how/tower-crane/Tue, 27 Oct 2026 00:00:00 GMTMove the trolley and the load on a 3D tower crane and see how load moment, counterweight, foundation, wind limits and the climbing mast change.https://explorehall.com/en/how/transistor/https://explorehall.com/en/how/transistor/Tue, 27 Oct 2026 00:00:00 GMTGate voltage draws electrons into a conducting channel in a MOSFET transistor. Raise the voltage in the cutaway and compare current and inverter output.https://explorehall.com/en/how/turbocharger/https://explorehall.com/en/how/turbocharger/Tue, 27 Oct 2026 00:00:00 GMTA cut-away 3D turbo on a four-cylinder engine. Change throttle, boost and the intercooler to see turbo speed, air temperature, power and turbo lag.https://explorehall.com/en/how/under-the-street/https://explorehall.com/en/how/under-the-street/Tue, 27 Oct 2026 00:00:00 GMTA 3D cut through a city street down to 18 m. Lift off the asphalt and soil layer by layer, tilt the sewer, and see which pipes a 2 m dig would hit.https://explorehall.com/en/collection/vinyl-record/https://explorehall.com/en/collection/vinyl-record/Tue, 27 Oct 2026 00:00:00 GMTHow does a vinyl record work? Drop the needle on a 3D turntable, cut your own groove, and see two 45° walls carry stereo at 33⅓, 45 or 78 rpm.https://explorehall.com/en/how/water-treatment/https://explorehall.com/en/how/water-treatment/Tue, 27 Oct 2026 00:00:00 GMTA water treatment plant clumps fine particles so they settle and filter out. Change coagulant dose and grain size, then follow turbidity towards the tap.https://explorehall.com/en/experience/animal-vision/https://explorehall.com/en/experience/animal-vision/Mon, 26 Oct 2026 00:00:00 GMTSee a garden, a night forest, a reef and a farm from the air through the eyes of 69 animals, with the studies that measured each one.https://explorehall.com/en/how/arch-bridge/https://explorehall.com/en/how/arch-bridge/Mon, 26 Oct 2026 00:00:00 GMTCompare a stone arch, a Pratt truss and a suspension bridge in 3D. Move a load and watch the thrust line, member forces and cable shape change.https://explorehall.com/en/how/atp-synthase/https://explorehall.com/en/how/atp-synthase/Mon, 26 Oct 2026 00:00:00 GMTHow does ATP synthase work? A 3D model in six scenes: proton-motive force, c rings of 13 species, mitochondria, chloroplasts, bacteria, V-ATPase and the 1997 rotation test.https://explorehall.com/en/how/bicycle-gears/https://explorehall.com/en/how/bicycle-gears/Mon, 26 Oct 2026 00:00:00 GMTA smaller front ring and larger rear cog make a hill easier to pedal. Shift the 3D bike, set power and gradient, and compare cadence across gears.https://explorehall.com/en/follow/braille-signals/https://explorehall.com/en/follow/braille-signals/Mon, 26 Oct 2026 00:00:00 GMTBraille is read by fingertip; semaphore uses flag positions. Type text to compare braille, semaphore, fingerspelling and maritime signals in 3D.https://explorehall.com/en/how/crystals/https://explorehall.com/en/how/crystals/Mon, 26 Oct 2026 00:00:00 GMTSalt forms cubes because its atomic pattern repeats along flat planes. Build crystal unit cells, compare lattices and test planes with X-ray diffraction.https://explorehall.com/en/collection/enigma/https://explorehall.com/en/collection/enigma/Mon, 26 Oct 2026 00:00:00 GMTHow did the Enigma machine work? Type on a 3D Enigma I wired like the real rotors I to V, watch the rotors step, trace one letter through the reflector and decrypt a 1941 message.https://explorehall.com/en/how/jet-engine/https://explorehall.com/en/how/jet-engine/Mon, 26 Oct 2026 00:00:00 GMTAn airliner jet engine gets most thrust from air pushed around its hot core. Compare seven engine types, change throttle and altitude, and read thrust.