Origami-like quasi-mechanisms with an antiprismatic skeleton

Animations of origami-like quasi-mechanisms with an antiprismatic skeleton (based on a regular n-gon) of sandglass type (for n=3,4,5,6), which are either shaky or have an extremal snap, i.e. one realization is on the boundary of self-intersection. In the latter case also the shaky configuration is displayed (center), which has to be passed during the snap between the two realizations (left, right) of the polyhedron.