I'm sure a real Marauder's Map would come in very useful - but if you can't have a magic one, why not make this one and pretend?
You will need:
Draw your map on the paper. When you are happy with it, fold your map as Sarah shows us below:
Now decorate the front of the map.
Finally, rub cold tea over both sides of the paper and leave it to dry to get an 'aged' effect. Doesn't Jack's Marauder's Map look great?