Set includes four wooden, 12-piece construction vehicle jigsaw puzzles–a cement mixer, a bulldozer, a dump truck and an excavator–each stored in a separate compartment of a sturdy wooden box! The slide-on box lid doubles as a convenient puzzle board! Each puzzle piece is shape-coded on the back for easy sorting. Great for travel! This product is certified by the Forest Stewardship Council. FSC certification ensures that products come from responsibly managed forests that provide environmental, social, and economic benefits, and that forests are protected for future generations.