Coliseum Mini Bricks, Monument Kits that Come with Teensy Faux-Stone Textured Plastic Blocks. Monument kits that come with teensy faux-stone textured plastic blocks (1/4" cubes or 1/4" x 1/4" x 1/2", among others) Includes mortar, a mixing tub and a very, very small trowel. he Coliseum (approx 5" dia) has 132 pieces, instructions, and a mounting base. Suitable for kids with small-motor skills and patience. Neatness counts.