Step-by-step instructions teach you how to fold over 40 geometrically inspired original projects. Each model is folded from a square sheet, using geometric properties to create a wide variety of two and three dimensional models. Geometric concepts are explained throughout this work. 2D color pattern models include the Sierpinski Triangle, Marble Square, Radioactive Hexagon, stars, and more. 3D models include boxes, troublewits, prisms, antiprisms, diamonds, and antidiamonds.  Also shown are Tic-tac-toe and chess boards with pieces. Models range from simple to very complex.