The EDU61004 is a Leonardo da Vinci Printing Press Model Kit. Leonardo da Vinci studied the Guttenberg printing press and finelytuned it for greater efficiency. In his design da Vinci used a handpress with an automatic system that moved the typesaddle forward and back along a tilted surface. His press used a double thread which would increase the travel of the press for each turn made of the lever. The scientific genius of Leonardo da Vinci is brought to life through this articulated model. The invention that inspired this snaptogether replica is taken from the pages of Da Vinci’s priceless and aweinspiring notebooks. All models are made of plastic and require no special tools. Manuals are very educational and teach how these inventions have evolved into what they are today.