Blocks, preformed blocks as bricks to build scenes, and arenas. It is simple: if you have got enough blocks you can build everything. The only fear is that you can wreak a domino effect… So, this guy divided his Colosseum in 4 sections, cast or bought a lot of blocks, used some glue to strengthen all. The arena is ready after some work, and with some paint and sand all can resemble something very ancient rather than a decoration made by sugar cubes.