Pick one or more of the following inventions to explain:
1.) Who invented it.
2.) How it has changed our world and sparked other inventions or advances.
The inventions are:
-phonograph
-telephone
-motorized car
-airplane
-vaccinations
-assembly line
-air conditioning
-bifocal lens (glasses)
-electric hand held calculator
-cotton gin
-crayons
-elastic
-jeans
-light bulb
-locomotive (train)
-paper towels
-potato chips
-thermometer
-video games