I suppose any 3D puzzle counts, although I think of this one because of how compact they were, while forming a relatively smooth round shape. Capsule, large, etc. Whenever I see those loose piece 3D puzzles, I get confused, because the pieces can slide around and be confusing.
This was the game I was talking about: It's actually a virtual 3D puzzle game, similar to ones I see in Barnes and Noble and such.