Make your own amazing 3D printed optical illusions based on the work of Professor Kokichi Sugihara, including the "impossible arrow" and other shapes! These illusions exhibit "anomalous mirror symmetry" where their reflections appear flipped left to right in a mirror. Instructions and working example code in both MATLAB and Python are available on the Science Buddies website: https://www.sciencebuddies.org/science-fair-projects/project-ideas/3D-Printing_p003/3D-printing/3d-printed-optical-illusion