Surprising new 3D forms from flat curved shapes. Could you make your own Squaricle, 3-Dform, Wobbler and Twisted Bean yourself? Developable Surfaces such as these are made from a single sheet. There are ten models that introduce D-Forms, as well as explanatory material to develop your understanding. Templates are also provided to explore ellipses with different aspect ratios, but all one perimeter. Such explorations provide fascinating projects for mathematicians, designers, artists and paper engineers.