Iwahiro's Apparently Impossible Cube is an example of a coordinate motion puzzle - all the pieces have to be moved into place at the same time.
You can find the original at http://puzzlewillbeplayed.com/444/IwahiroAIC/1/
Impossible_4_01_01_S1.stl | 62.8KB | |
Impossible_4_01_01_S2.stl | 62.8KB |