These are early days. You can make 3D printing a nano-scale technology, as with these devices for catching single cells from the Netherlands, at 3Ders. If you want your kid to be the next Jobs, or the next Gates, teach them science and engineering. Tell them to get their hands dirty. I'm not the only person who believes this. Old China hand James Fallows at The Atlantic sees it bringing manufacturing jobs back to America . Note too that Makerbot is based in Brooklyn, a few blocks from the new home of the Brooklyn Nets. It's a sign. Value creation is moving from sleek office towers to live-work spaces in lofts and abandoned factories, from Manhattan to Brooklyn (and Queens). Put your money into creating new value, into replacing people with machines so we will have new jobs doing what even robots can't. Don't be John Henry. At the time of publication, the author was long HD, AAPL, MSFT and DDD. Follow @DanaBlankenhornThis article is commentary by an independent contributor, separate from TheStreet's regular news coverage.