This is a simple 3 board burr puzzle that should be printable on most 3D printers.
http://puzzlewillbeplayed.com/3BoardBurr/Carbon/
I used an eMaker Huxley with a 0.3mm nozzle.
EDIT: The XMPUZZLE file is now also available for download. Get a copy of Burr Tools to open it (http://burrtools.sourceforge.net/).
Carbon.xmpuzzle | 466.0B | |
Carbon.zip | 30.2KB | |
Carbon_5_0_0_S1.stl | 6.1KB | |
Carbon_5_0_0_S2.stl | 6.9KB | |
Carbon_5_0_0_S3.stl | 6.9KB |