Instructables user William has put the finishing touches on his last Lego 3D printer, boasting a wide range of colorful blocks that come together to form one fully functional 3D printer. This particular machine is centered around an extruder made from a glue gun, meaning that yes, your fabrications will be made of hardened glue, as he demonstrates. The supplies consist of myriad blocks, plates, pins, wheels, and more. Read more at 3DPrint.com: http://3dprint.com/106676/lego-3d-printer-3-0/