The magnet will attract the metal paper-clip and allow you to move it around on top of the card. Now you can see how quickly you can guide your hedgehog through the maze and get him out of the city.

Can you use similar materials to design and make a Harry Hedgehog game that can be played by two people? Think about the object of the game (is it to escape from a maze as quickly as possible, for example?). Make sure that the card, or board, for your game is also large enough.