When 3D printing pens burst onto the scene about a year and a half ago, many people saw the technology as no more than a glamorized hot glue gun. They were fun to play with, but not really useful for creating anything practical. At least that’s what many people believed when the 3Doodler stunned the world by raising $2.3 million on Kickstarter. Since then, this glamorized hot glue gun has been partially responsible for some of the most incredible works of art that you will ever see. One artist named Justin Mattarocchia, 3D printed a life size plastic man. Another artist, Matthew Butchard, used the 3Doodler to create a remote controlled airplane and car. Both of these designs were incredibly unique and awe inspiring.