These hex pieces are precision laser cut from 1/8" (3mm) MDF, not the brittle foam material you may be used to seeing from other manufacturers. You can add foam to the top of these hexes to create elevated terrain (hills, etc) and still have a durable MDF base that will stand up to years of continued use.
The hexes come unfinished. Just glue the sidewalks on and paint them and add whatever ground covering you like to the other areas.
The roads on the hexes are fully compatible with our 6mm Modular Road System.