All pieces are made of high-quality steel. Step by step illustrated instructions are included for easy to follow directions. Tools are also included. Develop three dimensional thinking that promotes creativity, learning and fun. Basic construction sets are perfect for beginners or those looking to brush up on their building skills. Metal parts are forged from high quality steel. Includes illustrated instructions and tools for easy building. Designed, engineered and manufactured in Germany. Parts are interconnectable and can be assembled to any of our expansion kits.