The Boo-Boos that Changed the World Summary When you cut yourself, what’s the first thing you do? Reach for a Band-Aid, right? Before the 1920s, Band-Aids did not exist. Josephine Knight was accident prone and needed to save her cuts from infection. Her husband,… Continue Reading “The Boo-Boos That Changed the World: A True Story About an Accidental Invention (Really) Lesson Activity”