Master Builder 620 piece block set. This Australian made assortment of coloured bricks, half bricks, half cap bricks, roofing tiles, windows and doors, and now includes axles and wheels as well. Includes 10 Master Builder project cards and ten young builder cards. The Little Architect - Construction System is simple to use and features a unique, easy locking mechanism. These versatlie and easy to use bricks permit the construction of wonderful structures and patterns that will provide children with hours of fun and enjoyment while enhancing important creative thinking, problem solving and fine motor co-ordination skills. The Little Architect activity cards provide ideas for getting children started with their own creative building projects. Comes in plastic storage tray. Ages 4-12 years.