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. This model is made of plastic snaps together and requires no special tools. The manual is very educational and teachs how this invention has evolved into what it is today. Leonardo da vinci designed the first selfpropelled cart capable of moving without being pushed or pulled manually. The precursor to the automobile was one of the many inventions that da vinci created dealing with locomotion and transportation. No batteries required.