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THE BURRITOBOT IS A 3-D PRINTER THAT LETS USERS FABRICATE A DELICIOUS BEAN BURRITO VIA AN IPHONE INTERFACE MECHANISM. WHILE THE PRINTER MIGHT BE HUMOROUS, THE PROOF OF CONCEPT IS VERY, VERY REAL.

Mathematicians have now visualized abstract mathematical objects called flat tori - items resembling donuts with corrugated, fractal surfaces. These were thought to be impossible to envision in ordinary 3-D space... until now.

Last year Golan Levin's son decided to build a car. Aside from the minor inconvenience of being 4 years old, the younger Levin faced an engineering challenge. His Tinkertoys, which he wanted to use for the vehicle's frame, wouldn't attach to his K'Nex, the pieces he wanted to use for the wheels. It took his father, an artist, hacker and professor at Carnegie Mellon, a year to solve that problem. In the process he cracked open a much larger one: In an age when anyone can share, download and create not just digital files but also physical things, thanks to the proliferation of cheap 3-D printers, are companies at risk of losing control of the objects they sell?

A few months back, we talked about the challenges faced by libraries in the era of ebooks, digital information and shrinking budgets. An emerging idea, now being pioneered at one New York state library, is to offer 3D printing facilities to enable constituents to develop and innovate new ideas and products. The Fayetteville Free Library of Fayetteville, NY recently has assumed a new mission in efforts to serve its constituencies with 3D printing facilities. The "FFL Fab Lab" is a space set aside with 3D printing technology, which seeks to encourage innovation and learning of the concept. At the foundation of the FFL's Fab Lab will be a MakerBot Thing-o-Matic 3D printer, donated to the library. The Fab Lab's 3D printer uses plastic as its raw material.

Joey Hudy, a young "maker" from Phoenix went to the White House this week to show off his project, the "Extreme Marshmallow Cannon." When President Obama saw it, he told Joey: "Let's try it." Joey set up the air cannon, which uses a bicycle pump to build up air pressure, and put a marshmallow down the barrel. When he pressed the trigger, a single marshmallow was shot out across the room to the delight of everyone, but especially the president.