An optimistic TED talk about bringing laptop computers to every Colombian child

I notticed the repetition of simple sentences like "Yes to the world , Yes ..."
Also I think the talk affects your feelings using simple metaphores like the "opened window" or the "vaccine". Another strong aspect of its effectiveness seems related to the enthusiasm Nicholas Negroponte gives to its ideas that makes it so lively.
I hope you'll enjoy this talk, it's really optimistic if some of you are depressed about the week of school to come.

http://www.ted.com/index.php/talks/nicholas_negroponte_takes_olpc_to_colombia.html