Stack And Stick Bridge Set Stack and Stick offers you a better building block system using solid wood blocks for enhancing playtime building fun Each set of Stack and Stick blocks are proudly made in the USA, Safety Tested, and Green Stack and Stick recycles the lumber and materials from the furniture and cabinet industry into each building set Stack and Stick meets all safety standards, is CPSIA approved, and winner of many toy associations awards Made from all natural white hard maple, with no stains, chemicals, or paint