Illustrated Expedition Island: a volcano, an observatory dome, a hangar and a tree-house lab around a turquoise bay.

Explore Koydo

Everything your child can dive into

Koydo is a whole learning world for ages 8–11 — every subject, hundreds of activities, stories and more, all in one calm, ad-free place.

Try a sampleBrowse the activity library

Inside Koydo Kids

Pick where to start

  • Illustration of a girl in overalls kneeling beside the friendly robot she built in a sunny workshop.

    All Subjects

    Math, English, science, history, art and coding — every subject in one place, tracked as your child grows.

  • Illustration of a girl in glasses building a small robot car at a desk beside her laptop, with glowing shapes floating around her.

    Hundreds of Activities

    Hands-on, playful activities that turn every skill into something to do, not just read.

  • Storybook illustration of two children climbing a glowing staircase of clouds into a starry sky.

    Story Library

    Short stories to read together that grow reading confidence and a love of books.

  • A math sample question in Koydo Kids: 89 plus 97, with four answer choices and a score counter.

    Math Practice

    Targeted, adaptive math drills that meet your child exactly where they are.

  • Illustration of a girl in an orange expedition jacket standing on a rocky ridge, looking across at a steaming volcanic crater.

    Try a Sample

    A free taste of Koydo Kids — play a few lessons and activities before you decide.

  • Storybook illustration of two children sitting hand in hand on a cloud, surrounded by glowing cloud singers.

    Progress

    See what your child has mastered, where they're growing, and what's next.

Play right now

Hundreds more to play, right now

Beyond the lessons, Koydo opens up a whole library of games, labs and creative studios — hundreds of interactive activities across every subject, plus dozens of games and mini-apps your child can jump into today.

Browse the activity library

Games & puzzles

Classic games and brain-benders your child can play right now, in the browser — no download, no ads.

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.