All posts

A DIY escape room at home for 7-to-12-year-olds: codes, number locks and a secret box

An orange envelope, a purple arrow pointing to a blue combination lock whose three yellow dials show three dots, one dot and two dots, then another arrow pointing to a wooden chest with red bands.

In an escape room, players follow a chain of puzzles: solving one gives you a code or a key that opens the next spot, until you finally open the last box. Children of around 7 to 12 often love this kind of game, because every solved puzzle leads straight to something real to do: turn a lock, lift a cup, open an envelope.

The good news is that you can set one up at home in an evening, with things you already have. This article shows how to build a chain of three puzzles, with sample puzzles we wrote ourselves, plus hints and answers, so the whole family can play this weekend.

What is an escape room at home?

At home, nobody gets locked in a room. What gets "locked" is a secret box with a small reward inside: a snack, a note from you, a new game, or simply the right to choose tomorrow's dinner.

The game runs on three rules:

  • Each key opens one lock. A puzzle gives exactly one code or one key, and it opens exactly one thing.
  • The clue is somewhere else. A solved puzzle only tells you where to look next; it is never sitting right next to the lock it opens.
  • Solve in order. No skipping ahead: until you crack puzzle one, you have no clue for finding puzzle two.

These three rules are what turn the game into a reasoning workout: your child has to read carefully, write down what they know and check their answer before trying a code.

A few safety points: never lock a door or cupboard with anyone inside; don't hide clues up high, in the kitchen or near sockets; if there are younger siblings, keep keys and small parts out of their reach. Keep a sheet with every code on it, in case a lock gets stuck.

What you need

  • A box that closes: a shoebox, a biscuit tin or a storage box with a handle.
  • A three-dial combination lock, the kind used on luggage, threaded through the box handle or a string tied around the box. No lock? Draw a "paper lock" and stick it on the box: your child reads you the code, and if it's right, they can open it.
  • Three envelopes, paper, pens and some sticky notes.
  • A thick book with page numbers and five plastic cups in different colours (for the sample puzzles below).
  • Optional: a timer and three "hint" cards.

Setting the code on a luggage lock usually goes like this: set it to the current code, press the button or turn the pin, dial the new code and let go. Every lock is a little different, so check the instructions that came with it and try opening it a few times before you play.

Plan it backwards from the box

The easiest way is to work from the end to the beginning. Choose the box and its code first, then ask: which puzzle gives this code? Where is that puzzle hidden? What leads to the hiding place? Keep going backwards until you reach the first card you hand to your child.

Here is the plan for this article:

Step Your child has Solves to Opens
1 The first envelope: the star and circle puzzle A page number The book: the second envelope is tucked in at that page
2 The five cups puzzle The colour of one cup That cup: the third envelope is underneath
3 The three digits puzzle A three-digit code The combination lock on the secret box

Write the plan on a separate sheet, with the hiding places and answers. Before you call your child in, walk through it once yourself from step 1: is every envelope in the right place, and does the lock open with the right code?

Three sample puzzles with hints and answers

These three puzzles match the plan above. Copy them onto cards and draw the symbols by hand. Give hints one at a time, and wait a few minutes before giving the next one.

Puzzle 1: the star and the circle

The puzzle. Each shape stands for a digit, and the same shape always means the same digit.

  • ★ + ★ = 8
  • ★ + ● = 11

The next envelope is inside the thick book, at page ★● (the star's digit first, then the circle's).

Hints:

  1. Which line has only one kind of shape? Start there.
  2. Two stars make 8, so what is one star?
  3. Once you know the star, put it into the second line.

Answer. Two stars make 8, so one star is 4. Four plus the circle makes 11, so the circle is 7. The envelope is at page 47.

Puzzle 2: the five cups

The puzzle. Five upside-down cups stand in a row, from left to right: red, yellow, green, blue, purple. The envelope is hidden under one of them.

  • It is not at either end of the row.
  • It is not next to the red cup.
  • It is not next to the purple cup.

You may lift only one cup.

Hints:

  1. Read one line at a time and cross out the cups it can't be.
  2. After the first line, the yellow, green and blue cups are left.
  3. Which cup is next to the yellow one? Which cup is next to the blue one?

Answer. The first line rules out red and purple. The second rules out yellow, because it is next to red. The third rules out blue, because it is next to purple. Only green is left.

Puzzle 3: the three digits

The puzzle. The box's code has three digits.

  • The three digits add up to 10.
  • The middle digit is double the first.
  • The last digit is bigger than the middle one.

Hints:

  1. Try the first digit as 1, then 2, then 3… Each time, what is the middle digit?
  2. Once you know the first two digits, what must the last one be for the total to be 10?
  3. Check the last rule against each try.

Answer. If the first digit is 1, the middle is 2 and the last is 10 − 1 − 2 = 7, and 7 is bigger than 2: everything fits. With 2 first you get 2, 4, 4, but 4 is not bigger than 4. With 3 first, the last digit can only be 1, which is smaller than 6. Anything bigger and the total goes over 10. So the code is 1-2-7.

When your child opens the box, ask them to tell you how it went: which puzzle was hardest, and what they tried before they found the answer. Talking through their thinking is part of the game too.

Adjust it for different ages

Rough age Ideas
7–8 Two or three steps; counting, comparing and spot-the-shape puzzles; read the puzzles together; no timer
9–10 Three or four steps; symbol and elimination puzzles; your child keeps their own notes; three hint cards to trade in when stuck
11–12 Four to six steps; puzzles with several conditions; a timer just for fun; your child designs a room for you to solve

Every child is different, so treat these ages as a rough guide. A few more ways to keep it fun:

  • You're the hint keeper, not the solver. When your child asks for a hint, give exactly one level.
  • Play in teams, with a job each: one reads the puzzle, one takes notes, one tries the code. Swap jobs after each puzzle.
  • Wrong codes cost nothing. If a code doesn't work, go back and look for the rule that doesn't fit, with no points lost.
  • Swap roles. After a few games, let your child plan the chain and hide the clues for the family. Writing a puzzle with exactly one answer is much harder than solving one.

In Dologi, "Secret message" puzzles give your child a code table where each symbol stands for a digit, so they can read out the secret number; "Crack the code" puzzles hide part of the table, so they have to work it out from example messages. It's the same kind of thinking as the star and circle puzzle above.

In short

  • An escape room at home is a chain of puzzles leading to a secret box; nobody is locked in.
  • Three rules: each key opens one lock, the clue is somewhere else, solve in order.
  • Plan it backwards from the box, and walk through it yourself before you play.
  • Give hints one level at a time, praise the thinking, and let your child design a room for the family.

Read more: Picture codes for children: a code-breaking game for home and An indoor treasure hunt: picture clues for children who can't read yet.