ContentRoof

3D simulations

Explain how anything works, with a 3D simulation that really runs

Ask a question. ContentRoof writes the script, records a natural voice and plays a real simulation in time with every word: a heart pumping, a jet engine firing, the Moon's shadow crossing the Earth. In 11 languages.

Make a 3D simulation →Free to try · no editing skills

Why a simulation, not an AI-generated video

It runs the real rulesBlood flows the way blood flows, light bends the way light bends. AI video generators paint what looks right and often get the science wrong.
Every moment on its wordThe valves snap shut on “valves”, the eclipse arrives on “eclipse”. The narration drives the simulation, so the two never drift apart.
In your languageNatural voices and proper captions in English, Urdu, Hindi, Arabic, Spanish, French, Portuguese, German, Italian, Russian and Polish.
From one questionNo 3D software, no animator, no editing. Type a question, change any line you like, download.

Body organs

How the heart pumps bloodHow the heart pumps bloodBody organsHow the lungs workHow the lungs workBody organsThe digestive systemThe digestive systemBody organsHow a muscle moves a boneHow a muscle moves a boneBody organsHow the eye worksHow the eye worksBody organs

Cells and microbes

How a vaccine trains your immune systemHow a vaccine trains your immune systemCells and microbesDNADNACells and microbesHow a neuron sends a signalHow a neuron sends a signalCells and microbes

Space and gravity

Gravity and orbitsGravity and orbitsSpace and gravitySolar and lunar eclipsesSolar and lunar eclipsesSpace and gravity

Growth and spread

How things spreadHow things spreadGrowth and spreadCompound growthCompound growthGrowth and spread

Particles and heat

Solids, liquids and gasesSolids, liquids and gasesParticles and heat

Electricity and magnets

How electricity worksHow electricity worksElectricity and magnets

Molecules and reactions

Chemical reactionsChemical reactionsMolecules and reactions

Light

Light and colourLight and colourLight

Waves and sound

Sound waves and the Doppler effectSound waves and the Doppler effectWaves and sound

Forces and motion

Newton's laws of motionNewton's laws of motionForces and motion

Machines and engines

How a car engine worksHow a car engine worksMachines and enginesHow a jet engine worksHow a jet engine worksMachines and engines

Air and water flow

How planes fly and ships floatHow planes fly and ships floatAir and water flow

Inside the Earth

Inside the Earth: earthquakes and volcanoesInside the Earth: earthquakes and volcanoesInside the Earth

Earth's cycles

The water cycle and the greenhouse effectThe water cycle and the greenhouse effectEarth's cycles

Life and evolution

Evolution and natural selectionEvolution and natural selectionLife and evolution

Atoms and nuclear

Atoms, fission and fusionAtoms, fission and fusionAtoms and nuclear

Technology

How technology works: GPS, the internet, AIHow technology works: GPS, the internet, AITechnology

Math and patterns

Fibonacci, the golden ratio and fractalsFibonacci, the golden ratio and fractalsMath and patterns

Scale

The scale of the universeThe scale of the universeScale

History in motion

History in motion, on a 3D globeHistory in motion, on a 3D globeHistory in motion

How it works

  1. Type a question: “How does a jet engine work?”, “Why is the sky blue?”, “How does a vaccine work?”.
  2. ContentRoof picks the right simulation, researches the facts and writes a short script, cueing each moment to a word.
  3. A natural voice reads it; the simulation plays in time, with captions. Edit any line and the video follows.
  4. Download it for YouTube Shorts, TikTok, Reels or your lesson.

For teachers

A lesson students remember: show the heart's valves closing instead of describing them, the Moon's shadow instead of a diagram, molecules melting instead of a definition. Make one in the language your class speaks, and pair it with ContentRoof's lessons that end in a quiz. ContentRoof →

For science and education channels

Science Shorts that look like a studio made them, every day, in your language. A simulation holds attention because something is always moving, and it stays right because it runs the real thing.

Questions

What is a 3D simulation video?

A short narrated video where a real simulation runs on screen: a heart that actually pumps, light that actually bends, an engine whose pistons actually fire. ContentRoof writes the script, records the voice and plays the simulation so each moment lands on the word that names it.

How is it different from AI video generators?

AI video generators paint frames that look plausible, and often get the science wrong: valves in the wrong place, light bending the wrong way. A simulation runs the actual rules and numbers, so it is right every time, and it follows your narration word by word.

What topics can I make?

Anything the simulations cover: the human body (heart, lungs, digestion, muscles, the eye), cells, DNA and the brain, space and gravity, eclipses, heat and matter, electricity, chemistry, light, sound, forces, engines and jet engines, flight, earthquakes, the water cycle, evolution, atoms, technology, maths patterns, the scale of the universe and history on a globe. Ask a question and ContentRoof picks the right one.

Which languages?

Eleven: English, Urdu, Hindi, Arabic, Spanish, French, Portuguese, German, Italian, Russian and Polish, each with natural voices and captions written properly.

Is it free?

Yes, to try: the free plan makes 2 3D simulations a month (720p, with a small mark). Starter makes 4, Pro 12 and Studio 20, in 1080p without the mark.

Who is it for?

Teachers who want a lesson students remember, science and education channels, students making a project, and anyone who explains how things work.

Make your first 3D simulation →

EN · UR · HI · AR · ES · FR · PT · DE · IT · RU · PL