All showcases
Playable demo
Physics clicks when you control the energy and watch matter respond.
Loading…
All showcasesPlayable demo
Matter & Energy Lab makes states of matter something you can heat and cool.
Drag the temperature and watch particles freeze, melt, and boil — solid, liquid, gas — right in your browser.
Available nowShowcase status
Curious learners, STEM families, and teachers who want to see how matter changes state.
Coming soon: pressure, heating curves, and a richly illustrated lab scene with labeled measurements.
AI by design
AI is part of how Koydo teaches here, adapts to your child, and shows you their progress.
Koydo AI helps explain, rephrase, ask better follow-ups, and keep learners moving without replacing effort or teacher judgment.
Every bit of practice, every mistake, and every creative moment helps Koydo tune the next lesson to your child — and keeps your parent or teacher summary clear and honest.
Our promise stays simple: age-aware help, strong safety, progress you can see, and room for a real person to step in when it matters most.
Try it for real
What you can play and explore right now.
The particles respond to the exact temperature you set — it is not a recorded video.
Cross the melting or boiling point and the state of matter changes right away.
Plays right on this page, no sign-in needed.