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. Learn & Grow magnetic tiles have been designed to encourage imagination and inspire open-ended play. A rocket, a house, a castle, road tracks around our city or an imaginary world. The opportunities are almost endless. Magnetic tiles provide children with open-ended experiences where the only limitation is their imagination. Each tile has strong magnets to allow for tall buildings and structures that do not continually fall down and frustrate little builders. Sets can each be added to expand play opportunities and are compatible with all major brands.