SMALL SIZE, BIG IDEAS: Each block is a chunky compact size (slightly less than 1-1/4 inches x 2-1/2 inches x 1 inch thick) that's ideal for building on a tabletop, light panel, or in any small space. GREAT ON A LIGHT TABLE: Transparent cool blue hue transmits light just like a block of ice; structures seem to glow and shimmer! IDEA CARDS INCLUDED: Laminated activity cards get you started with 5 double sided laminated activity cards with 10 total fun-to-build designs. Re-create an ice wall, crystal-like columns, or an arctic DURABLE, SAFE PLASTIC: Blocks are made of soft, durable, washable PETG (Polyethylene terephthalate) plastic with rounded edges and ridges.