GREENGUARD® Gold certified. This hollow block set contains (7) assorted shapes in a variety of sizes so children can let their imagination run wild. Available in a (20) piece or (40) piece set. Constructed from 100% Plywood, and coated with our exclusive Tuff-Gloss® UV finish. Fully rounded corners and edges for maximum safety. Fully Assembled. 10 year warranty. Made in the U.S.A.