Island Bridges
Build as many bridges as the number on each island and link all islands into one network.
Play now
How to play?
- Tap between two islands to build a bridge; tap again for a double bridge.
- Bridges can't go diagonally or cross each other.
- The puzzle ends when every island has as many bridges as its number and all islands are connected.
Skills it builds
- Number sense and addition
- Reasoning with constraints
- An introduction to network/graph thinking
- Seeing the whole: single islands and the full network
Tips for parents and teachers
- First find the certain islands: an island with only one neighbour, or the biggest numbers.
- Work forward by counting: "How many more bridges does this island want?"
- When done, trace the network with a finger to check that all islands are connected.
A child-friendly version of the Japanese Hashiwokakero (Hashi) puzzle. Puzzles progress through 24 levels from easy to hard; the hint button shows the next step rather than the answer.
Using it in class
Solve it together on the interactive whiteboard as a 10–15 minute warm-up: ask students for guesses first, then let a volunteer make the move. The printable version works for learning stations and homework.
Frequently asked questions
What age is Island Bridges for?
Island Bridges is best for ages 9–12; the 24 puzzles go from easy to hard, so younger or older children can start at their own level.
What skills does Island Bridges build?
Number sense and addition, reasoning with constraints, an introduction to network/graph thinking, seeing the whole.
Can Island Bridges be played offline or on paper?
Yes. From the grown-ups' corner you can print puzzles with a separate solution page.
Is it paid, and do I need an account?
No. It's ad-free, account-free and free; progress is stored only on your device.
Similar games
Numbers and patterns · Ages 4–5Twin TracksTap squares to make flowers bloom; the number of flowers in each row and column must match the marks on the edge.
Moves and planning · Ages 9–12Lantern GridWhen you tap a lantern, it and its four neighbours change. Find a way to light all the lanterns.
Numbers and patterns · Ages 4–5Pattern TrainStudy the order in the wagons and pick the right symbol for the empty wagon.