Now completely renovated, with new elements and new design. Every young engineer can build objects from thereal world. The set is made of durable plastic and includes a spanner, screws, pulleys, nuts, etc. Various designs are included. 8 large size cards included. Detailed examples of constructionwith progressive stages, helping thechild’s attention and reasoning. Tobegin making more complex assembliesdeveloping creativity. Improved component design and better quality materials! Extremely easy to thread! With progressive difficulty modelcards to create different models.