Real opponents. Live leaderboard. Daily Grand Prix at 4 PM. One room code launches a class, a birthday party, or a family rivalry — in under 60 seconds. No sign-up to play. No student data collected. COPPA & GDPR safe. Free.
verified_user No sign-up to play • Safe for kids • COPPA & GDPR safe
7 print-ready PDFs — 4×4 animal puzzles for age 5 up to 10×10 expert. Free forever. No sign-up.
Trusted by teachers, parents, and clubs worldwide
First played it once. Came back 847 times.
"I wrote the room code on the board, turned around, and they were already competing. No instructions needed. It just works. I use it every single Friday now."
Priya S.
Year 6 Teacher, London
"My 8-year-old beat me. Legitimately. On a 4×4 Animal Grid against my 9×9 Classic. She screamed for five minutes. Best £0 I have ever not spent."
Marcus T.
Dad of two, Manchester
"My son placed 7th globally in the Grand Prix on his third day. He didn't stop talking about it for a week. He still mentions it. He practises every day now."
Meera K.
Homeschool parent, Bengaluru
"I cover different year groups every week. Kidoku works for all of them — Year 2 on Animal Grid, Year 9 on 9×9. I've had it bookmarked for six months. It has never let me down."
James O.
Supply Teacher, Dublin
"I've been doing newspaper sudoku for 12 years. Nothing compares to a live session when you can see someone breathing down your neck with 2 cells left. This is a different sport."
Elena V.
Software Engineer, Toronto
"I evaluated 14 edtech tools this term. Kidoku was the only one our DPO said yes to same day. No accounts, no data, no IT setup. It passed every check before we even demoed it."
Dr. Aisha M.
Head Teacher, Birmingham
From 0 to live leaderboard in under 60 seconds — for classrooms, families, and friend groups.
Visit kidoku.app/live. Create a Quick Match or private room in one tap. No sign-up, no settings to configure.
Write 4 letters on the board, drop in Slack, text it across — everyone joins on their own device instantly.
Every player sees the live leaderboard update as you go. One winner, real celebration, instant rematch demand.
Write a 4-letter room code on the board. Turn around. Your class is already competing. Kidoku Live is the no-prep, no-account classroom logic game that works on every Chromebook, tablet, and phone — with zero IT approval needed and zero student data collected.
Unlike quiz-based tools, Kidoku builds constraint logic and critical thinking through live sudoku competition. Most teachers run their first session in under 60 seconds. No quiz prep, no lesson planning, no gradebook sync. Just a URL and a room code.
No accounts. No ads. No chat. No data. Just the puzzle — and a live leaderboard your students will talk about all week.
Every age, every occasion. Pick the guide that fits your situation.
Animal Grid 4×4. Real opponents. Five rounds in a row — every time. The multiplayer puzzle 8-year-olds play more than once.
9×9 live against global opponents. The next-level difficulty for ages 10–12 who have outgrown solo puzzle apps.
Animals replace numbers. Real sudoku logic for children who aren't confident with digits yet. Age 5+.
Real global opponents, live leaderboard, daily Grand Prix. For competitive kids who find solo apps too easy.
Planets and rockets replace numbers. Discovered for the theme — stayed for the competition.
One room code, four friends, different devices. Multiplayer puzzle you can play from anywhere. No login.
Hall of Fame. Global rank. Personal best timer. For children who run on improvement metrics.
Real global rankings. Any child, anywhere, competes against the world on the same live puzzle.
Superhero pictures for spatial thinkers. OT-recommended. Builds logic confidence without number symbols.
Animal Grid removes every digit. Build real logic confidence before numbers enter the picture.
Winner card. Global first place. The daily tournament moment that gets shared everywhere.
9×9 and 10×10 against the world. Hall of Fame benchmark. The challenge gifted learners can't easily beat.
Different grid sizes. One leaderboard. Same puzzle. The rivalry that becomes a daily ritual.
One code on the board. 22 students racing live. Zero prep. The Kahoot alternative for primary maths.
HOTS in 10 minutes. Constraint logic thinking for Year 7–10. No setup, works on Chromebooks.
18 students. Waiting list by week 5. The after-school activity that runs itself — and grows.
4×4 Animal Grid to 9×9 Classic in one session. Every student at the right level, one shared leaderboard.
Write the code, turn around, class is playing. Every year group, zero prep. The bookmark every supply teacher needs.
No student data required to play. No IT deployment. DPO-friendly by design. The edtech tool that passes the check before the demo.
43 students. Code over the PA. 3-round relay bracket for the whole journey. Still mid-game on arrival.
7 print-ready PDFs — 4×4 animal sudoku for age 5 up to 10×10 expert. Zero prep for classroom use. Download and print in 30 seconds.
No in-game ads, no rabbit holes. The screen time that builds logic skills instead of consuming content.
Any distance. Same puzzle. Laptop vs tablet. The intergenerational game that needs zero setup.
Constraint propagation as family entertainment. The puzzle engineers play with children who think like them.
Two cities. One room code. The live puzzle ritual that keeps travelling parents connected every evening.
20-minute daily brain break that counts as maths. Grand Prix as end-of-school-day reward. Zero prep.
Assign 3 sessions, students play 7. The between-session logic habit that forms in six weeks.
You teach them game 1. They beat you game 2. Build a series. Track who leads. Free..
Channelling sibling rivalry into a daily logic ritual. Mixed ages, fair competition, 45 minutes of peace.
Quick Match 6×6 on mobile data. Real opponents. The commute game that sharpens logic every day.
Grand Prix, Hall of Fame, global leaderboard. What newspaper solvers graduate to when solo isn't enough.
Drop the code in Slack. Six adults, 8×8, 10 minutes. Competitive vocabulary creator. No forced fun.
14 kids, 40 minutes left, zero equipment. Animal Grid race on any device. Birthday child wins in front of everyone.
4×4 for the youngest, 9×9 for older. One room code, any devices. Rain stopped — nobody went outside.
6 weeks. Grand Prix daily at 4 PM. Prevent the summer slide — arrive in September with a global ranking.
The only live multiplayer logic game that passes every school, parent, and player test.
| Feature | Kidoku Live | Typical Quiz Apps | Solo Puzzle Apps |
|---|---|---|---|
| Real-Time Live Opponents | check_circle | cancel | cancel |
| No Data Required to Play | check_circle | cancel | cancel |
| No Account Required to Play | check_circle | cancel | cancel |
| Picture Themes (No Numbers) | check_circle | cancel | cancel |
| Works on Chromebooks / Any Device | check_circle | check_circle | cancel |
| No Ads During Gameplay | check_circle | cancel | cancel |
| Daily Global Tournament | check_circle | cancel | cancel |
| Free to Play | check_circle | cancel | cancel |
Kidoku Live was built from the ground up to pass every school privacy check. No student accounts. No personal information required to play. No persistent identifiers. No in-game chat. The game auto-generates a safe, anonymous username like QuickFox44 for each session — and discards it when the session ends.
School DPOs have approved Kidoku same-day because there is simply nothing to review: no data flows, no vendor agreements, no IT deployment. The FTC's 2025 COPPA amendments require full compliance by April 2026 — Kidoku meets every requirement because it collects no personal information from children under 13.
For UK and EU schools navigating GDPR, Kidoku requires no data processor agreements. No personal data is processed, so there are no data protection obligations. Head teachers, IT leads, and DPOs approve it faster than traditional printable worksheets.
Compliant with COPPA (Children's Online Privacy Protection Act) and GDPR. Safe for children aged 5 and up. Trusted by head teachers, IT leads, and parents worldwide.
Yes. The entire game — Quick Match, Grand Prix, private rooms, classroom mode, and all themes — is free to play. An optional Kidoku Plus upgrade exists for individual users who want extra features, but it is not required to play any session or enter any tournament.
No account needed to play. Kidoku Live auto-generates a safe username (like QuickFox44) for the session. No personal information is required to join a game.
It is a logic-drill alternative rather than a quiz alternative. One room code on the board starts a class in under 60 seconds. No IT approval, no student accounts, and it works on Chromebooks. The live leaderboard drives engagement without requiring lesson prep. Most teachers describe the first session as the easiest class they have managed in months.
Ages 5 to adult. The Animal Grid 4×4 uses pictures instead of numbers for children aged 5–8. Grid sizes scale from 4×4 to 10×10. Adults compete in the same Grand Prix as children — there are no age-separated sessions. Every age finds its appropriate challenge level independently.
No. There is no chat, no direct messages, no friend requests, and no social profile at any point. Children compete through the shared leaderboard only. This is a deliberate design choice for child safety and has been confirmed by school DPOs as the feature they value most.
Any device with a modern browser — iPhones, Android phones, iPads, Android tablets, Chromebooks, Windows laptops, Macs. No app installation is required. Multiple device types can compete in the same session simultaneously with no fairness impact.
100+ players competing live right now. One room code and you're in. No sign-up. No download. Just the puzzle.
Free to play • No sign-up • No in-game ads • No chat