CRUMB
An interactive journey into computers.
Click the orb or press Space
An interactive journey into computers.
Click the orb or press Space
Your phone, your laptop, a rocket, a stoplight — they're all running the exact same thing: instructions telling electricity where to go.
Learn one, understand all.
No theory first. No textbooks. You build a computer, see it work, then we explain why.
Because doing is understanding.
You build the computer once. Then you program it to do anything. Hardware is the skeleton. Code is the personality.
Different paths for different goals. Pick what fits you.
Watch tutorials, read code, understand the philosophy. When you're ready, you can build.
A breathing light. You'll write zero code. You'll just prove to yourself you can make a computer do something.
A tiny computer called an ESP32 (~$12)
A small computer with WiFi & Bluetooth. Yours forever — reprogram it, build with it, learn from it. Same type of computer in thermostats, doorbells, and IoT devices everywhere.
Order it, bookmark this page, come back when it arrives
Tap each when ready
Popup asks to connect
Look for "USB Serial"
Watch the progress
That light in your hand is your code running. No internet needed. It's yours.
Built for my brother Luke, who struggles with technology not designed for how his brain works. If we're building a future full of computers, people deserve to understand them.
All computers run instructions that move electricity. Learn one, understand all. Complexity is just more instructions.
Open source (GPL-3.0). No gatekeeping. No subscriptions. Yours forever.