Games & puzzles
Classic games and brain-benders your child can play right now, in the browser — no download, no ads.
Grades 3-5 · Ages 8 to 11
Some questions are worth climbing for.
Math, reading, science, writing, and more — guided step by step for curious 8-to-11-year-olds, with an account a parent sets up and manages.
Nothing babyish. You're 8 to 11 — old enough for real questions, real explanations, and real answers.
Nothing overwhelming. Every subject breaks into small skills, so you always know what to try next.
Nothing hidden. A parent sets up the account and can see how it's going. No ads, ever.
What do you want to learn today?
Six core subjects for grades 3-5 — pick one and start exploring.
Math · Grades 3-5
Math you can watch doing something
A mill wheel is fractions and multiplication turning in the open air — how many buckets, how much water, how fast it goes round. Koydo Kids teaches the same ideas the same way: broken into clear steps you can picture, with hints instead of red X's, and as many tries as it takes.
- Multiplication, division, and fractions for grades 3-5
- Step-by-step hints when you get stuck
- Word problems that come from real situations
Science · Life, earth & space
Point a big question at the sky
Why does the moon change shape? What is it actually made of? Curiosity like that deserves a real answer, not a shrug. Koydo Kids covers life, earth, and space science with explanations built on real evidence — the kind you can go outside and check for yourself.
- Life, earth, and space science for curious minds
- Explanations backed by real examples, not hand-waving
- Rewards asking “why?” one more time
Social Studies · The wider world
The world is older and bigger than you think
That skeleton stood on this planet a hundred and fifty million years before anybody drew a map. Social studies is the story of everything that happened next — the places, the people, and the choices that made the world you were born into. It is a lot more interesting than a list of dates.
- Maps, communities, and history that actually stick
- How people in other places live right now
- Ideas worth thinking — and writing — about
Reading & Writing
Read it, get it, then say it your way
Every morning somebody launches a balloon, reads what comes back, and writes it down so the rest of us know what the weather will do. That is reading and writing doing a real job. Koydo Kids builds the comprehension, vocabulary, and paragraph-writing that let you understand something properly — and then explain it to somebody else.
- Comprehension questions that build real understanding
- Vocabulary that grows with every passage
- Paragraphs and stories, one clear step at a time
Hundreds more to play, right now
Beyond the lessons, Koydo Kids opens a whole library of games, labs and creative studios — 350+ activities across every subject, right in the browser, no download.
Make & create
Open-ended making — draw, build, compose and cook up ideas with no wrong answers.
Labs & discovery
See how the world actually works — experiments, the night sky, and hands-on science simulations.
Practice & tools
The everyday tools that make homework and revision faster — and a lot less painful.
Made to keep kids learning
Every part of Koydo Kids is built to encourage curiosity — not just test it.
Guided, not gimmicky
Every subject is organized into clear skills so kids always know where to start and what comes next.
Progress you can see
Signed-in families can return any time to pick up learning right where they left off.
Parent-guided & ad-free
A parent or guardian creates the account and manages access, recovery, and approvals. No third-party ads to kids.
Parent-guided for ages 8-11
Account access and recovery are managed by a parent or guardian, and there are no ads shown to children.
Parent-managed sign-inAccount recoveryPrivacy informationNo ads to children
One Koydo, all the way up
Kids is the 8-to-11 step of a ladder that starts at age two. Younger or older sibling? There is a Koydo built for exactly where they are.
Questions parents ask
What ages and grades is Koydo Kids for?
Koydo Kids is built for grades 3 through 5, roughly ages 8 to 11. Content is leveled so it stays challenging without being frustrating. A parent or guardian sets up the account, and every subject unlocks from there.
What subjects does Koydo Kids cover?
Koydo Kids covers Math, Reading, Science, Writing, Social Studies, and Spelling — the core elementary subjects for grades 3 to 5 — with guided practice in each.
Who manages the account?
A parent or guardian creates the account, manages recovery methods, reviews privacy information, and approves child access requests. Children do not register on their own.
Is Koydo Kids free, and are there ads?
Koydo Kids never shows third-party ads to children. A parent or guardian creates the account, and premium learning features are managed from it. The current price and terms are always shown before any purchase is confirmed.
How do I recover a parent account?
Use Forgot password on the Koydo Kids sign-in page. Account recovery stays on the kids.koydo.app origin.
Progress & parents
Ready to start the adventure?
Ask a parent or guardian to set up your account — that is how Koydo Kids saves your progress, so you can stop mid-question and pick up exactly where you left off. Parents keep control of sign-in, recovery, and any purchase, and there are never ads shown to children.