So many people talking about how 3d printers is something impractical for everybody.<p>The other day I attended a talk about the history of personal computers, and certainly it rhymes.<p>At the time everybody was saying, a personal computer? who wants this? People do not need a database for cooking, or a spreadsheet, it is a very expensive typing machine and it is very hard to use(command line). It was true.<p>What happened is that personal (and then mobile) computers evolved from a entrepise-centric to user-centric to grandma-could-use-facebook centric computers.<p>Most people in the old days could not imagine what the future would look like, because computer did exist, but their applications were different to what they predicted.<p>In the same way I believe 3d printing is amazing, not for what it is now, but what it will became.<p>I volunteered giving 3d classes for children and it is incredible what they could do after you teach them the basic concepts.<p>What is shocking for me is that it is &quot;normal&quot; for those 10 years old to design things that I could only do after studying engineering and gaining experience. Some of them absorb knowledge like an sponge.<p>I see in them the next Linux Towards, but instead of OSes, it becomes possible to design a car, or a plane over the Internet.Before 3d printers it is so hard that is practically impossible for normal people to do it.