Remember famous Renaissance genius Leonardo da Vinci? Know that, besides being the painter of the famous Mona Lisa, da Vinci was also a phenomenal inventor? Assemble and play with two of the machines that da Vinci designed, the catapult and the crossbow, and see how every detail of your models faithfully follows the original designs of the great Leonardo! Read the 14-page book and learn more about the interesting life and ideas of the Italian genius. Discover how his inventions worked and how some of his ideas are still used today!