How A Geek Dad And His 3D Printer Aim To Liberate Legos

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? In March Levin and his former ­student Shawn Sims released a set of digital blueprints that a 3-D printer can use to create more than 45 plastic objects, each of which provides the missing interface between pieces from toy construction sets. They call it the Free Universal Construction Kit.