The Tiny World Inside Everything
Like Duolingo, but for The Tiny World Inside Everything. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
For the part of you with thirty open tabs that never became anything.
A short one: 26 levels across 3 sections, about 52 minutes end to end, roughly 10 days at five minutes a day. It moves through Building Your First Universe, Meet the Tiny Team Members, and The Energy Hidden Inside. It starts from scratch.
Free forever · No credit card · iPhone & Android

Key ideas in The Tiny World Inside Everything
- Three types of subatomic particles
- Electron orbits vs center
- Atomic identity
- Proton ID card
- Changing elements
- Atomic structure and identity
- Subatomic particle locations
- All matter is composed of atoms
- The proton count is the 'ID card' of the atom
- Protons, neutrons, and electrons are the universal building blocks
- Protons, neutrons, and electrons are the three parts of an atom
- Protons and neutrons sit in the center while electrons orbit
- Opposite charges attract each other
- The nucleus acts as a central anchor
- Like charges repel each other
- Protons are packed tightly together
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives The Tiny World Inside Everything the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
If you were to take apart a single atom, how many distinct types of subatomic particles would you find inside?
Get it right to open this lesson and 25 more in the app.
Where The Tiny World Inside Everything takes you
Ever wonder what you're actually made of? Discover how tiny invisible building blocks snap together to create the entire universe, from your morning toast to the stars above.
- 1
Building Your First Universe
- The Lego Bricks of Reality
- How to Glue an Atom Together
- Why Solid Things Feel Solid
- The Secret Power of Static Shocks
- 2
Meet the Tiny Team Members
- Protons: The Identity Makers
- Electrons: The Busy Social Butterflies
- Neutrons: The Heavy Peacekeepers
- Mapping the Atomic Neighborhood
- How Atoms Trade and Share
- The Periodic Table Cheat Sheet
- 3
The Energy Hidden Inside
- Why Atoms Move Faster When Hot
- The Invisible Force Fields
- What Happens When Atoms Break
3 sections · 13 units · 26 levels. Built to play, not to enroll.
You pick the voice
The Tiny World Inside Everything is taught in the The Professor style: clear, structured, thorough. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
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Start The Tiny World Inside Everything today.
Download Tomo, search The Tiny World Inside Everything, and play your first lesson in under a minute.