There was a town in Prussia called Konigsberg. The town centre of Konigsberg was an island because a river ran around the city cutting it off from the land in the rest of the town. After passing the island, the river broke into two parts.So that they could travel from the centre to other parts of the town, the local people built bridges - seven to be exact. This is what a rough diagram of the bridges might look like. The bridges are represented by the yellow bars:

The people enjoyed walking across the bridges so much so that they began to try and plan a way that they could walk around the town and over the bridges but cross each bridge just one time.

Why not try to plan the journey:
Make your own diagram of Konigsberg and its bridges and try to plan the townsfolks' journey. Remember, you can only cross over bridge once.

Why not try to re-plan the town:
Can draw a new map of Konigsberg that has only six bridges?
You still have to be able to walk around the town and over the bridges, crossing each bridge just one time. Is it important which bridge you decide to remove? What would happen if more bridges are added?