All showcases
Playable demo
Abstract physics gets concrete when learners control the energy and see the matter respond.
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All showcasesPlayable demo
Matter & Energy Lab makes states of matter something you can heat and cool.
Drag the temperature and watch a real, computed particle model freeze, melt, and boil — solid, liquid, gas — in the browser.
Available nowShowcase status
Curious learners, STEM families, and teachers who want a hands-on phase-change model.
Coming soon: pressure, specific-heat curves, and a Wonderworks-grade 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 particle motion and spacing are computed from the temperature you set — not a recorded clip.
Crossing the melting and boiling points changes the modeled state of matter live.
Runs fully in-page with no sign-in.