To use this NYC Construction Site Terrain Pack, simply place the detailed terrain pieces on your existing urban playmats. You can arrange them however you like to create your own unique battlefield. When you're playing, you can choose to either build the neighborhood back up or have exciting battles in the chaotic construction site. As for maintenance, keep the miniatures away from sharp objects to avoid scratches. If they get dirty, you can gently wipe them with a soft cloth. Also, store them in a dry place to prevent any damage. Have fun enhancing your Marvel: Crisis Protocol experience with this great terrain pack!