📒 Clue notebook
🕵️ Suspects (tap the button under each one: ? → ✗ ruled out → ✓ maybe)
🔍 Accuse!
Who did it?
Why?
Why Detective Games Are Good Thinking Practice
Children love a mystery. The moment something has gone missing, been nibbled or been knocked over, they want to know who did it, and that curiosity is exactly what good learning runs on. A detective case is really a reasoning problem dressed up as a story. To solve it, a child has to read carefully, notice details, hold several facts in mind at once, rule possibilities out and then explain why only one answer is left. Those are the same skills that help with maths word problems, comprehension passages and science experiments, but here they feel like play.
Every case in Capy Detective is kind. Nobody is a villain: the culprit is a dog who could not resist the cookies, a little brother who borrowed a crayon, a parrot who flapped too hard or the wind that blew the homework away. Each story ends with the problem being put right, so the game is about thinking clearly, not about blaming anyone.
How to Play a Case
- Read the story. Each case starts with a short story and a question, such as “Who took the last curry puff?”
- Search the picture. The scene hides clue spots: crumbs, muddy footprints, a wet umbrella, a feather, a clock showing a time. Tap each one and it is written into the clue notebook. The notebook shows how many clues are still to find, and the Hint button makes one of them glow.
- Meet the suspects. Every suspect has a cartoon face and says something. Look at the faces as well as the words: a red cap, glasses, a ponytail or brown fur can all matter.
- Use the notebook. Tap the button under each suspect to mark them: a cross when a clue rules them out, a tick when they still fit. Crossing people out one by one is the heart of detective work.
- Accuse, and say why. Choose who did it and choose the reason that proves it. A right suspect with the wrong reason keeps the case open, because a detective must be able to explain the answer, not just guess it.
If the accusation is wrong, Capy names the clue that rules that suspect out, so your child can look again. There is no penalty except fewer stars: three stars for solving a case with no wrong accusations, two stars after one wrong try, and one star after more.
The Three Levels
| Level | Suspects | What the clues are like |
|---|---|---|
| K2 to P1 | 3 | Picture clues that match what you can see: brown fur, big paw prints, a pink bow, a green feather. Very short sentences that a grown-up can read aloud. |
| P2 and P3 | 4 | Each suspect says where they were and when, and every case has one clock or time clue. Two or three clues must be put together, because each one only rules out some suspects. |
| P4 to P6 | 4 or 5 | Alibis on a timeline, cases where exactly one person is not telling the truth, secret codes to decode with a key, and logic grids where every clue fills in part of a table. |
The Thinking Skills in Each Case
- Matching evidence. At the youngest level, a clue simply has to match: grey fur belongs to a grey animal. Even this teaches children to check every suspect against the clue, not just the first one that comes to mind.
- Combining clues. In many cases two suspects fit one clue. Mei has a pink bow, but so does Hana; only Hana also has glasses. Children learn that the answer is the suspect who fits every clue, which is the same idea as finding a number that is both even and bigger than 10.
- Reading time. The P2 and P3 cases use clocks and times. If the board was wiped at 7:15 and the drawing was there at 7:30, whoever arrived at 7:10 cannot have drawn it, because their drawing would have been wiped. This is real practice with time, before and after.
- Timelines and alibis. At P4 to P6, the suspects’ statements are drawn as a timeline. Children find the window when something happened and see whose bar crosses it, the same way they read a bar graph.
- Truth and lies. In a “one of them is not telling the truth” case, children try each suspect in turn: if this person did it, which statements would be untrue? Only one choice leaves exactly one untrue statement. Trying each possibility in an organised way is one of the most useful strategies in mathematics.
- Codes. Two cases hide their key clue in a secret message: one shifts every letter three places along the alphabet, and one turns letters into numbers, with A as 1 and Z as 26. The key is shown, and decoding it is careful, patient work with the alphabet.
- Logic grids. Three children, three pets and three doors: a grid of boxes, and a handful of clues. Tap a box once for a cross and twice for a tick. Every tick means the rest of that row and column can be crossed, and the grid slowly fills until only one answer is possible.
Talking About the Reasoning
The best part of a detective game is the conversation. When your child names a suspect, ask “How do you know?” and “Which clue rules the others out?” Encourage full sentences with because: “It was Biscuit because the paw prints are big and Mochi has small paws.” If they guess, that is fine; ask them to check the guess against every clue. When a wrong accusation shows a clue they missed, praise them for looking again rather than for being right the first time. Changing your mind when the evidence says so is what good thinkers do.
Younger children can play with a grown-up reading the story and the statements aloud. Let the child do the looking and the tapping, and the deciding. Older children can play on their own, and they often enjoy writing their own case for someone else to solve.
Ideas for Home and the Classroom
- Detective partners. Two children solve a case together, but each must say one reason out loud before they press Accuse.
- Write a case. After solving a few, children write their own mystery: a story, three suspects with something different about each one, and two clues that together point to one of them. Swap and solve.
- Case files. Print a case file for each group. It has the story, the picture, the suspects, the clue list, notebook boxes and an answer page you can keep back.
- Code club. Use the shift code and the number code to write secret messages to a friend, and give them the key.
- Grid challenge. Solve a logic grid together on the board, saying which clue lets you cross out each box.
Printing a Case File
Press Print a case file on any case. The first page has the story, the picture with every clue spot, the suspects and what they said, a numbered list of clues and a notebook table to tick and cross with a pencil. For code cases it adds the secret message and the key, and for logic grids it prints the empty grid. The last page is the answer page with the solution and the reasoning, so a teacher or parent can check the work. Only the case file is printed, not the rest of the page.
Nothing to Install, Nothing Uploaded
Capy Detective runs entirely in your browser on any phone, tablet or computer, with no account and no download. There is no limit on cases. Solved cases, stars and your detective rank are kept only in your own browser, and nothing is sent anywhere.
Frequently Asked Questions
What age is Capy Detective for?
There are three levels. K2 and P1 cases have three suspects and picture clues, such as brown fur or a green feather. P2 and P3 cases have four suspects, what each one says, and a clock clue. P4 to P6 cases have four or five suspects and use timelines, secret codes, logic grids and puzzles where exactly one person is not telling the truth.
How does a detective game help children learn?
Every case is a small reasoning problem. Children read carefully, collect evidence, rule people out one clue at a time and explain why the answer must be right. These are the same skills they use in maths word problems, reading comprehension and science investigations.
Why do I have to choose a reason as well as a suspect?
A good detective can explain the answer, not just guess it. After naming the suspect, your child picks the reason that really proves it. If the suspect is right but the reason is not, the case stays open and Capy asks them to rethink the reason.
Is Capy Detective free?
Yes. There is no account, no download and no limit. Solved cases and stars are kept only in your own browser, and any case can be printed as a case file with an answer page.