Smallpox Scarring
When the smallpox vaccine was introduced, things were looking up...until kids saw the needle! The thing was two-pronged and infinitely terrifying. Kids were safer than ever, but the scar the vaccine left behind was definitely pretty scary to see.
Ditto Machines
Ditto Machines, also called mimeographs, were duplicating printing devices used for kids' classrooms. They left ink all over your hands and smelled terrible, but it made homework easier to distribute for teachers!