The key design element of HingeCore, the finger hinge, which we produce by (a) laser-cutting foamcore “half-way”. When folded, the fingers on one side slide between the fingers on the opposite side, where they stay put, based on friction. This basic principle allows for very fast assembly, because (b) finger hinges allow models to be assembled by folding across a pre-scored edge, (c) finger hinges stop folding at a predefined angle, allowing the resulting model to take shape, even before all plates are in place, and (d) folded hinges eliminate the need for tabs, as they stay put without glue. At the same time, (e) resulting models are very sturdy, as they are constructed from solid plates and because of the finger structure in finger hinges, (f) allowing the result to withstand high loads. Finally, (g) finger hinges produce a clean look as there are no exposed finger joints.