Escape room: The Deep-Sea Submarine
An ocean escape room for grades 3–6: octopuses with three hearts, whales that are mammals and starfish. Solve the puzzles to surface.
The story
The class submarine dived to the bottom of the ocean, and now the surfacing system has locked! Only divers who know their sea creatures can open it and rise to the top.
A curious octopus peers in through the porthole, and it looks like it’s trying to help.
5 story stations · online you can pick a level that adds more locks.
Run it at home or in class
What to prepare
- Station sheets with pictures of sea creatures
- A 4-digit lock or an envelope
- Pencils and scrap paper
- Soap bubbles for the celebration (optional)
Tips for the facilitator
- Print real photos of an octopus, a blue whale and a starfish next to each station.
- Dim the classroom lights and play ocean sounds for atmosphere.
- After the end, tell the pupils one more fact: an octopus has blue blood.
Difficulty level for “The Deep-Sea Submarine”
The story clues stay the same on every level; harder levels add more locks in between. You can ask for a hint at every stage.
🐙 The Deep-Sea Submarine
The class submarine dived to the bottom of the ocean, and now the surfacing system has locked! Only divers who know their sea creatures can open it and rise to the top.
0 of 6 stages solved
Stage 1: The curious octopus
1/6An octopus has 8 arms and 3 hearts.
Facilitator guide: 🐙 The Deep-Sea Submarine
What the room practises
Ocean science, multiplication and grouping animals.
The 5 stations (without the answers)
- The curious octopus: What is the number of arms times the number of hearts?
- Who breathes air?: Which group of animals does the whale belong to?
- Counting in the deep: How many arms do they have altogether?
- The blue giant: What is this animal?
- The surfacing system: What is the code?
Preparing and printing
On the easy level the printed kit has 7 pages: a facilitator sheet with the opening story, the setup list and every answer, plus an A4 card for each of the 6 stages. Besides printing, get ready: a 4-digit lock or an envelope and soap bubbles for the celebration (optional).
Most important: Print real photos of an octopus, a blue whale and a starfish next to each station.
Age and group size
Best with teams of 3–5 children. In a class or a big party, print a kit per team and run the room in parallel.
Giving hints in this room
Online the hints open one at a time; in the printed kit they sit in the facilitator table next to each answer. Give the first hint after a couple of minutes of silence, not at the first wrong guess.
Frequently asked questions
What age is “The Deep-Sea Submarine” for, and how long does it take?
It was written for grades 3–6, at easy–medium difficulty, and usually takes 20–25 minutes. It has 5 story stations, and online you can choose between three difficulty levels that add more locks.
What do I need to run “The Deep-Sea Submarine”?
A printer and these props: Station sheets with pictures of sea creatures; A 4-digit lock or an envelope; Pencils and scrap paper; Soap bubbles for the celebration (optional). The printable kit includes a facilitator sheet with every answer and a card for each stage.
What if the players get stuck?
Every stage has graded hints. Online they open one at a time; in the printed kit they sit next to each answer on the facilitator sheet. The first hint never gives the answer away.
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