If you're still wondering what the benefits are of affordable 3D printers and what purpose they may serve, this video may be able to help illustrate that benefit. These are two high school students, Tyler Richards and Jonathan Thompson, who had a problem with the initial watery ketchup on the first squeeze. By having the tools of 3d rendering software and and 3d printer readily at their fingertips, they were able to take a problem, come up with an idea for a solution and form their concept into a working prototype.
Young minds are full of creativity and if we can equip them with the proper tools and education, I'm sure they can solve many, many problems no matter how big or small. Well done Richards and Thompson.