What is a 123dx file and how do I open a 123dx file?
123DX files are 3D models created by 123D Design, a program used for designing models for print or fabrication. They store the 3D geometry of the model, as well as materials that define the surface appearance of the model. 123D Design models automatically assign connections between parts that give the model natural motions when moved.
Relevant 123dx file links:How to open 123dx file on Youtube
How to open 123dx file on Wikipedia
How to open 123dx file on Microsoft.com