Our new 18 piece pack contains uniquely rounded triangular pieces, that when joined side by side created a perfect half circle on a base built from two trapeziums. The shape can be expanded to a full sphere or ball shape if desired. The shapes allow endless build options with the dome pieces being able to be used individually or together. Our NEW 18 piece set includes: * 6 red curved triangles * 6 green curved triangles * 2 orange trapezium * 2 blue trapezium * 2 yellow trapezium The tiles are robust with a raised lip on the edge to protect the face from scratching. Stronger food grade ABS plastic, riveted and plastic welded with an internal logo to create a flat and more scratch resistant tile.