Human pluripotent stem cell (hPSC) aggregate morphology can be regulated at the microscale using microfilaments, micropatterned substrates, micropillar arrays, microwells, molded or 3D printed hydrogels, and microfabricated chamber devices. Gene editing tools may also indirectly exert control over hNO morphology (e.g. folding) by regulating cell behavior (e.g. proliferation).