"Is it an animal?" "No." "Is it in the kitchen?" "Yes!" The 20 questions game needs nothing but two people and a bit of imagination, which makes it perfect for car journeys, waiting rooms and the walk home from school.
It's also one of the best everyday exercises in reasoning. To win, children have to choose questions carefully, remember what they've already learned and draw a conclusion from it. This post explains how to play with children of different ages and how to help them ask smarter questions over time.
How to play
- One person thinks of an object and keeps it secret. At first, choose something you can both see, or something very familiar: a spoon, a cat, a ball.
- The other person asks questions that can only be answered "yes" or "no".
- Count the questions. The goal is to find the object within 20 questions. With young children, don't worry about the limit at all.
- When the guesser thinks they know, they can make a guess. A wrong guess counts as one question.
For children around 4 to 5, start with a small set: put five or six toys on the table, and one of you secretly picks one. The guesser can look at the toys while asking, which makes the game much easier to follow.
Good questions split the possibilities
Most children begin by guessing directly: "Is it a dog? Is it a car? Is it a banana?" That's a natural start, but each guess only rules out one thing.
The big idea to discover together is that a good question removes lots of possibilities at once, whatever the answer.
| Question | If "no" | If "yes" |
|---|---|---|
| "Is it a banana?" | Rules out one thing | Game over (lucky!) |
| "Is it something you can eat?" | Rules out all food | Rules out everything that isn't food |
| "Is it bigger than a chair?" | Rules out big things | Rules out small things |
You don't need to explain this as a rule. Instead, after a game, ask: "Which question helped you most?" Children often notice for themselves that "Is it alive?" told them more than "Is it a horse?".
Some helpful question starters:
- "Is it alive?"
- "Can you eat it?"
- "Is it in our house?"
- "Is it bigger than my hand?"
- "Is it used outside?"
Remember what you already know
A common difficulty is forgetting earlier answers: a child learns "it's not alive", then asks "is it a dog?" a minute later. That's normal, because keeping several facts in mind at once is hard work for young children.
You can help by making the information visible:
- Say the facts so far out loud: "So we know it's not alive, it's in the kitchen and it's smaller than your hand."
- Draw or write a quick list with two columns, yes and no, for older children.
- Use the toys on the table: when an answer rules a toy out, move it aside.
Moving rejected toys aside turns the thinking into something children can see, which is exactly how elimination works.
Swap roles
Being the one who answers is a different, equally useful exercise. Your child has to:
- Keep the object in mind and not change it halfway through.
- Decide whether each question is a yes or a no. "Is it soft?" can be tricky for a pencil case!
- Answer honestly, even when they'd love to keep the game going.
When an answer is unclear, talk about it: "Hmm, is a tomato a fruit or a vegetable? What should we say?" These small debates about categories are thinking practice too.
Variations by age
- Ages 4–5: guessing among a few toys on the table, no question limit, parent helps phrase questions.
- Ages 6–7: objects in the house or garden, count the questions, try to beat your last score.
- Ages 8 and up: animals, places or famous story characters that everyone in the family knows, a real limit of 20, and a look back at the end: "Which question was your best one?"
You can also play as a team: the whole family asks questions together and agrees on each one before asking it. That's a good way to hear how other people reason.
In Dologi, "Guess the rule" puzzles show some cards that belong to a group and some that don't. Like a yes or a no in this game, each card helps children rule ideas in or out until only one explanation fits.
In short
- The 20 questions game needs no materials and trains reasoning, memory and careful listening.
- Start with a few objects in view for young children, then widen the choice as they grow.
- Help children discover that a good question removes many possibilities, whatever the answer.
- Keep track of what you already know, and swap roles so your child practises answering too.
Read more: The process of elimination: the "if it's not this one, which one is it?" game