A 3-dimensional physical object dynamic display comprises a plurality of electrically-conductive particle control plates and a plurality of electrically-conductive particles that are loosely disposed over at least some of the plurality of electrically-conductive particle control plates. These particles are each capable of holding an electrostatic charge. The display further comprises a control circuit configured to use the plurality of electrically-conductive particle control plates to selectively position at least some of the plurality of electrically-conductive particles into an aggregated form to thereby dynamically form a 3-dimensional physical object.