In addition to the underground labyrinth, I also started putting together a smaller board to represent the surface of Seccundus. It took me a while to work out what to use as a basing material for these pieces. Then I hit upon Foamex. Foamex is used to create graphic signs and can be picked up quite cheaply at any printer’s or online. Unlike foam board it is solid all the way through, so it stays rigid and is much lighter than the equivalent width of MDF. It takes superglue and paint really readily too.