How did 3M’s David Windorski get ideas from college students to help him in designing the final commercial version of the Post-it Flag Highlighter?

The 3M Post-it Highlighter case presents a number of issues in marketing. Let’s get a robust discussion going around the following questions: How did 3M’s David Windorski get ideas from college students to help him in designing the final commercial version of the Post-it Flag Highlighter? How were the ideas important to the success of the products? What are the opportunities/threats for 3M to take the Post-it Highligher international?