From Gizmag:

The PopFab was developed by students Ilan Moyer and Nadya Peek, from the MIT CADLab and MIT Center for Bits and Atoms respectively. Billed as a "portable fabrication multi-tool," the machine was revealed through an online video showing the whole device folding out from a metal briefcase and almost immediately printing a small object after a bit of setup. All it takes is to attach the printing head to the fold-out arm, feed in some printing material, and connect a computer to transmit a design.