Draw a large circle on the piece of card, and then cut it out. (What's the easiest way to draw a circle on the card?). Then draw a complicated maze on the card and use pens and paints to mark it out clearly. Work out your design for the maze first on a piece of rough paper.

You could add some extra decorations to your maze, using pens and pieces of coloured paper. For example, you could draw a town that the hedgehog must escape from to return to his home in the countryside.