Making map art is very fun. I am almost done with my piece. All I need to do is glue a building onto my map. The main component of my piece is foam core. I cut out the Manhattan section of my map and glued it to foam core. I built my buildings out of foam core. It is very useful because it makes a good base, and is very sturdy when stacked. I am color coding my map and buildings based on places I go and places I do not.