Recent developments in additive manufacturing have greatly increased the resolution of 3D printers, with 100 nm features achievable under certain conditions. However, no method to date has simultaneously enabled ~10nm, arbitrarily heterogeneous material fabrication. We propose a new method of 3D printing, which may extend the resolution to the 10 nm scale while also utilizing truly heterogeneous starting materials, enabling the construction of new microstructures and products with previously unattainable material properties. This method combines the concept of pick-and-place assembly with localized laser-induced sintering, which limits the resolution of the 3D printer to the size of initial building blocks, rather than to the laser wavelength. This method is being tested at the micron scale with an optical microscope, and will later be miniaturized for in-situ SEM use after completing the proof-of-concept prototype. Possible applications include the creation of metamaterials, photonic bandgap crystals, and direct fabrication of materials at the nanoscale.