David, inventor of Post-It Flag Highlighters

14 of 15
David says he got the idea for the Post-It Flag Highlighter by observing college co-eds. While visiting a university, he says he saw students flipping through their textbooks to find highlighted sections.

"Post-It Flags are about finding things fast," he says. "And I thought, 'Well, why couldn't you put the two together and then you'd have the flags right at your fingertips—two in one."

These pens aren't just for the students in your life, as Oprah can attest. David says they're also popular among moms and office workers. Every audience member will get to test them at home, because they're all getting a box of Post-It Flag Highlighters.