- Moon Icosahedron by Calvin J. Hamilton, USA, 1998
Model can be found here. - Polyhedron Skyglobe by Richard Powell, Great Britain, 1998
Model can be found here. - Earth Rhombicuboctahedron by Carlos A. Furuti, Brazil, 2004
Model can be found here.
The hardest part of each of these models was getting the final side taped in place without crushing the model.