Do some research. Read all about past and current inventions that have had a great impact on society.
- The 50 Most Influential Gadgets of All Time is a fascinating report/slideshow just published by TIME.
- The 50 Greatest Breakthroughs Since the Wheel is from The Atlantic.
- 7 Amazing Teenage Inventors is from TIME.
- Here’s a U.S. Invention Timeline.
- The History Channel has a number of short video clips on different inventions.
- How Stuff Works has quite a few short videos on inventions.