Students learned about Leonardo Di Vinci and all of the inventions he kept in his sketchbook. He had flying inventions sketched out back in the 1500's! Students also made their own sketchbooks with many of their very own inventions. Below are some of the students favorite inventions from their sketchbook. You might notice that some of their words are backwards. Leonardo wrote his notes backwards so that it would be hard for people to read and steal his ideas.