Map Monsters. Okay, an expensive hobby when you don’t have maps to your disposal and you need to buy some, but then again, this idea is super cool so some money can be spend. Or look in the drawers at your parents house and just borrow those very outdated maps. Those maps that they used when you all went on Holiday to the south of France via the Route National, because the toll road was to expensive. And your parents where in an utter state of panic when the Parisian periferique was in sight. Those maps. No use to anyone anymore and perfect for creating a few very wow monsters.
Source: DIY on Facebook & Instructables.