Collection
Build it yourself like with a construction kit: gears, ratios, idler and worm, plus differential, watch movement and levers.
Apps
Drei Roboter aus dem Konstruktionsbaukasten nach den Computing-Kästen von 1985, aus Originalteilen: ein Drehtisch mit Lichtschranke und Impulszählung, ein Plotter mit zwei Schrittmotoren, der auf Papier zeichnet, und ein Knickarm mit vier Motoren, der Bausteine umsetzt. Gesteuert über ein Interface mit Ausgängen, Eingängen und Signalverlauf, mit Referenzfahrt, inverser Kinematik und Teach-In.
Engineering mechanicsTry it
Ein Robotergreifarm aus dem Nut-Zapfen-Baukasten, nachgebaut nach einer Kinderzeichnung von 1992: Drehscheibe, Ausleger, Unterarm und Greifer, bewegt von drei einfachwirkenden Zylindern an 3/2-Ventilen. Luft strömt sichtbar durch die Schläuche, Kolben und Federn arbeiten im durchsichtigen Zylinder, und ein roter Baustein soll aufs Podest.
Engineering mechanicsTry it
Ein Konstruktionsbaukasten in 3D aus nachgebauten Originalteilen der Epoche grau/rot: Bausteine mit Nut und Zapfen, Metallachsen, Zahnräder (Modul 1,5) auf Flachnaben und ein Motor mit Schnecke im 15-mm-Raster. Das Getriebe läuft echt: Übersetzung, Drehsinn und Drehmoment je Stufe, Zwischenrad und Schnecke, ein Fahrzeug auf dem Rollenprüfstand. Fünf Vorlagen auch als Bauanleitung.
Engineering mechanicsTry it
Ein Konstruktionsbaukasten in 3D: Lochbalken, Kreuzachsen, Zahnräder und Motor rasten im 8-mm-Raster ein. Das Getriebe läuft echt: Übersetzung, Drehsinn und Drehmoment je Stufe, Zwischenrad und Schnecke, ein Fahrzeug auf dem Rollenprüfstand. Fünf Vorlagen auch als Bauanleitung.
Engineering mechanicsTry it
Cornering, ice and a locked differential on a rear axle: the spider gears let the wheel speeds differ, n_L + n_R = 2 · n_carrier, and split the torque equally. On ice one wheel spins until the lock is engaged.
Automotive engineeringTry it
A mechanical watch movement to take apart: balance wheel and hairspring set the beat, the Swiss lever escapement releases the mainspring energy in portions. Escapement cycle in slow motion and steps, spring tension and amplitude, gear ratios with proof.
Physics experiments (Deutsches Museum)Try it
A gearbox as a 3D exploded view, linked to its product structure: quantity, structured and modular bill of materials side by side, engineering BOM against manufacturing BOM with the pre-assembled shaft as its own assembly. Build the structured BOM yourself and watch the parts appear in 3D.
Industrial EngineeringTry it
Ein echter Einzylinder-Viertakter (68 × 45 mm, 163 cm³, OHV) maßstäblich als Schnitt- und Explosionsmodell: Kurbelwinkel 0–720° drehen, Kolben, Pleuel, Kurbelwelle, Nockenwelle mit 2:1-Zahnrädern, Stoßstangen, Kipphebel und Ventile arbeiten sehen; Gas färbt sich je Takt, Zündung vor OT, Ventilüberschneidung sichtbar, p-V-Diagramm läuft mit.
Automotive engineeringTry it
Moment of a force M=F·r about a pivot with the perpendicular lever arm shown; the lever law on a seesaw with moment equilibrium ΣM=0 and the sense of rotation in colour.
Engineering mechanicsTry itCollections
Instruments from the inside: the grand piano action, synthesizer, electric guitar, electric bass and drum kit, all of them together as a band, bowed strings on violin and cello, organ, trumpet, flute, saxophone, handpan, guitar and keyboard. Cut them open, play them yourself and hear how the sound is made.
16 appsOpen collection
Sentence structure, participles, the accusative with infinitive, verb forms, sequence of tenses, small words, rhetorical figures and the hexameter in real passages from Seneca and Ovid.
8 appsOpen collection
Galvanic cells, reaction mechanisms, equilibrium and the Haber-Bosch process, acids and bases, dyes, plastics, intermolecular forces and molecular structure to try out.
18 appsOpen collection
Photoelectric effect, potential well, Franck-Hertz, Millikan, diffraction gratings, standing waves, particles in fields, induction and oscillations to try out.
23 appsOpen collection
Gene regulation, PCR, genetic crosses, protein biosynthesis, evolution, cellular respiration, hormones and ecosystems to try out.
24 appsOpen collection
Planning and steering projects: the iron triangle, stakeholders, network diagrams, earned value, schedule risk, team size, Kanban and waterfall against Scrum.
8 appsOpen collection
From sequences to loans: arithmetic and geometric growth, savings plans, annuities, compounding within the year and perpetuities.
11 appsOpen collection
Reading the traces: burial mounds in section, radiocarbon dating, settlements in the landscape and the tomb of Tutankhamun.
5 appsOpen collection
Why robot arms are heavy, how six axes guide a hand and how control holds the load.
6 appsOpen collection
Tables, keys, joins, groups and subqueries you can touch: how a database really reads.
7 appsOpen collection
Generative AI in strong images: what it can do, how it writes, why it convinces, how to use it well and where to take care.
7 appsOpen collection
Engine, brakes, high voltage, CAN bus and chassis: technology and diagnostics of the modern vehicle.
9 appsOpen collection
Heat in the city centre: heat islands, shade, trees and unsealing, using the old town of Reutlingen as an example.
7 appsOpen collection
Reading the small print, spotting subscription traps, placing risk figures and making texts understandable.
5 appsOpen collection
From equation to curve: initial values, linear equations, substitution and the worlds in which they apply.
7 appsOpen collection
Rules and physics in sport: offside in football, spin and the Magnus effect, the walls in padel.
3 appsOpen collection
From area to the integral: Riemann sums, antiderivatives, integration rules, units and improper integrals.
5 appsOpen collection
Mean, median, mode, variance, box plot and levels of measurement: descriptive statistics to try out.
10 appsOpen collection
From coordinates to the inverse: vectors, dot and cross products, linear equations and matrices in pictures.
14 appsOpen collection
Production principles, waste, one-piece flow, value streams, bills of materials and routing: how a factory is organised.
9 appsOpen collection
What the CRA requires of manufacturers: checking whether it applies, meeting reporting deadlines, keeping software bills of materials.
5 appsOpen collection
Reducing, common denominators, multiplying, dividing and mixed numbers: fractions step by step.
13 appsOpen collection
Proofs of special beauty to touch: Zagier's windmills, the museum guards and Buffon's needle.
3 appsOpen collection
How oscillations break down: coefficients, symmetry, phasor chains, the Gibbs phenomenon and the plucked string.
7 appsOpen collection
What happens inside the machine: objects, methods, operators, slicing and sorting in Python, visible step by step.
12 appsOpen collection
From the Patent Motor Car to the Z3: famous machines and experiments cut open in 3D.
12 appsOpen collection
Keyboard, intervals, scales, chords, the circle of fifths and groove: music theory you hear and play.
9 appsOpen collection
How sound is made and shaped: synthesizers and samplers, envelopes and overtones, waveforms and timbre, voice and orchestra, room acoustics and sound scenography — all audible in your browser.
26 appsOpen collection
Staging space, sight, light, sound and paths: visitor flows, showcase lighting, room acoustics, sound islands, projection mapping and the pavilions of world expos to try out.
17 appsOpen collection
Mathematical questions open for decades, for which an AI model proposed solutions in 2026, as interactive apps: understand the problem, experience the result.
32 appsOpen collection
From neurons and gradients to transformers, RLHF and agents: machine learning you can touch.
47 appsOpen collection
DNA, replication, transcription, translation and cell division as explorable 3D models.
27 appsOpen collection
Perspective, ornament, structure and space: how art and architecture work with mathematics.
25 appsOpen collection
Hyperloop, autonomous vehicles, warehouses and conveyors: logistics as interactive simulation.
17 appsOpen collection
Heart, eye, voice, skeleton and nerves: the human body in 3D, layer by layer.
12 appsOpen collection
Monty Hall, Simpson, Berkson and base rates: where intuition fails us with numbers.
15 appsOpen collection
Planets, stars, black holes and space probes: the cosmos to explore.
12 appsOpen collection
Light switches for nerve cells, a telescope made of ice, mirror-image chemistry and interest rates: the 2026 Nobel Prizes to try out.
8 appsOpen collection
Planted participants, smoke in the room, one dollar for a lie and experimenters who are themselves the subjects: famous social psychology experiments to try yourself.
5 appsOpen collection
Relations, classes, orders, bijections, different infinities and topology: mathematics as the science of structure, hands-on.
11 appsOpen collection
Riemann, P vs NP, Poincaré and other great questions of mathematics, made tangible.
16 appsOpen collection
Counting, arithmetic and shapes: maths for beginners, playful and clear.
6 appsOpen collectionWant to use these apps in your courses? Let’s find out what works for you.
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