Check out this video that shows MakerBot, a 3-D Printer in Action
http://scienceworld.scholastic.com/issues/03_04_13/book#/8
Click on "videos" in the lower right corner.
Assignment: The New York Times has just stopped its Green Blog, an online "magazine" about ways people can "go green" in their lives. How can the MakerBot be used to "go green" in your life or in others' lives?
