Learn all about buildings and how they support our livess. Build 9 working models such as a house, a pyramid and various types of bridges (Cable, Beam, Arch). Building instructions supplied with further builds available online. Booklet provides experiments, detailed explanation and learning quizzes. Stem instructions and workbooks included. Multiple builds possible. Online model plans. Fully compatable across all engino systems. Develops stem priciples. Size H27, W37, D5.5cm. For ages 3 years and over. Manufacturers 3 year guarantee. WARNING(S): Not suitable for children under 3 years old. Only for domestic use. This product contains abs, tpe and nylon.