I've been making a 6DOF robot arm, mostly printed with a Dremel 3d20 printer: https://digilab.dremel.com/products/3d20
It's a very reliable plug-and-play printer. I can often start a print and leave it all day after watching the first layer. It probably has more than two hundred hours of printing. The arm is an open source design found here: https://hackaday.io/project/12989-thor. I'm using this time to teach myself ROS by making a custom controller for it to interface with MoveIt, and hopefully I'll go on to write some joystick control or pick-and-place capability. One of my long-term dreams is to make an Iron Man costume (the Mk 3 or 4!), which was the reason I even got into 3D printing as a hobby. So, I've got my fingers crossed in this giveaway!