Handheld sculpture made for the ages, these designs are built by 3D printing directly in metal. Prices are $250-500.

All the art at a fraction the price, these palmtop sculptures run $60 to 90.

3D data from astronomy, biology, physics and more, including DNA and the ever-popular Galaxy Crystal, $20 and up.

Metal interpretations of polytopes, minimal surfaces and more, in the $150-500 range.

The best value in dodecahedra for your dollar: pocket math models starting at $72.

A laser etching service for anyone thinking about molecular biology: protein structures in glass paperweights and keychains, in full 3D, made from your PDB file.