STE
Buddy
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The Codex Society
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For ages 8–12
Turn What ifs into Experiments
Learn science and reasoning skills in an AI-saturated world.
We Don't Just Teach Science.
We Train Junior Scientists.
AI can hand your child an answer in seconds. STEMBuddy teaches the harder skill: how to investigate, reason from evidence, and explain what they found.
The answer lands. The thinking doesn't.
Ask AI “Why is the sky blue?” and a correct answer arrives in seconds — but it never becomes theirs. Your kid has the fact, yet never ran the test, weighed the evidence, or explained why.
THE STEMBUDDY WAY
Big wonder, smaller steps
STEMBuddy gives your kid the same question and a way to answer it: you can’t test the whole sky, so they build a tiny one in a glass — change one thing, watch what happens, and explain it — with coaching that keeps their voice, never a pasted answer. The conclusion is one they proved, and can defend.
See how the shift works in practice
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See inside the app — tap through it yourself →
REAL PROJECTS, REAL REASONING
Kids start with a question. STEMBuddy helps them turn it into a fair test.
They choose a project, make a prediction, collect evidence, and explain what they found — with AI guidance that supports the work without doing it for them.
The 5-step Investigation
Where your kid runs a real experiment — hypothesis to conclusion.
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Codex Society dispatch
Story-driven dispatches that pull your kid back three nights in a row.
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Claim-Evidence-Reasoning
Where your kid practices defending a conclusion with evidence — the form of every serious argument.
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Show your work
Every investigation ends in a Field Report — a signed record of what your kid tested, what they found, and why.
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Topics are the vehicle. Reasoning is the skill.
REAL EXPERIMENTS INSIDE
Kid-tested projects: safety first, then fair tests and clear thinking.
Investigation ideas inspired by real student science fairs worldwide and active citizen science programs. New projects added every week across seven science categories.
Motion & Forces
Straight Track or Curved — Which Ball Wins the Race?
Chemistry
Can You Build a Tower Out of Liquids?
Plants & Nature
How Does Water Climb Up a Plant With No Pump?
Engineering
Bridge Battle: Beam, Arch, or Truss?
Earth & Weather
Can One Tiny Park Cool a Block?
Animals
Does a Roly-Poly Have a Secret Turning Rule?
Human Body
How Much of 'Taste' Is Really Just Smell?
Motion & Forces
Straight Track or Curved — Which Ball Wins the Race?
Chemistry
Can You Build a Tower Out of Liquids?
Plants & Nature
How Does Water Climb Up a Plant With No Pump?
Engineering
Bridge Battle: Beam, Arch, or Truss?
Earth & Weather
Can One Tiny Park Cool a Block?
Animals
Does a Roly-Poly Have a Secret Turning Rule?
Human Body
How Much of 'Taste' Is Really Just Smell?
Motion & Forces
Can You Make Water Stop Leaking — by Dropping It?
Plants & Nature
Can a Plant Tell Which Way Is Up?
Space
Can a Stick in the Ground Tell You the Time?
Human Body
There's a Hole in Your Vision — Can You Find It?
Space
Does the Moon Spin — or Not?
Motion & Forces
Find the Liquid Inside an Egg — Without Cracking It
Space
Why Does the Moon Look HUGE on the Horizon?
Motion & Forces
Can You Make Water Stop Leaking — by Dropping It?
Plants & Nature
Can a Plant Tell Which Way Is Up?
Space
Can a Stick in the Ground Tell You the Time?
Human Body
There's a Hole in Your Vision — Can You Find It?
Space
Does the Moon Spin — or Not?
Motion & Forces
Find the Liquid Inside an Egg — Without Cracking It
Space
Why Does the Moon Look HUGE on the Horizon?
THE STORYLINE
One story runs underneath all of it.
Your kid doesn't get a curriculum. They get recruited.
They join the Codex Society as a new investigator, pair with a buddy who works each case beside them, and follow one story that walks them into every kind of science here — a marsh that stopped breathing, a map that lies, a last signal from Saturn.
Every case is a real investigation. Your child predicts before they test, records what actually happened, and defends a conclusion with evidence they gathered themselves.
The science is real and unchanged. The story is the reason they come back on a Tuesday.
No spoilers: the first cases are earned inside the app.
PARENT TRUST
Four rules we will not bend with your child’s work.
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Parents guide. Kids investigate.
You can suggest questions and send briefings, but your child writes the hypothesis, tests the idea, and explains the result.
How parent briefings work →
AI supports the work. It does not do the thinking.
STEMBuddy helps with structure, prompts, and next steps — but the final claim, evidence, and reasoning belong to your child.
How AI scaffolding works →
No public kid feed. No comments. No social pressure.
STEMBuddy is not a children’s social network. Kids build investigations, not profiles for strangers.
How we handle safety →
Published work is reviewed first.
A Field Report only becomes a Codex Entry after review. No auto-publish, no open posting.
How Codex review works →
Built for parents who want their kids to practice reasoning, not just collect answers. STEMBuddy uses story to create momentum, but the outcome is serious: a child who can ask better questions, test ideas, and explain what they found.
— Min, founder