At Toronto's Mini Maker Faire , visitors were able to see and test an innovation that was perhaps most stunning. The designers of the Hot Pop Factory have indeed managed to combine Leap Motion technology with that of 3D printing . Thanks to the motion controller, visitors could draw in 3D with a simple gesture of the hand. The immediately created 3D file was sent to the printer to shape the object made "freehand". A surprising and fun way to do pedagogy around 3D modeling and 3D printing.