This is a set of stackable blocks. The largest one measures 2" in diameter at the base.I set layer height at .2mm, 3 perimeters, 3 solid layers and infill at 40%.I created these as part of a project where a robotic arm could be taught to solve the Tower of Hanoi problem (look it up and try to solve it BEFORE you cheat and look at the answer). They're a neat desk toy, too. Enjoy!These instructions come edited from Wikipedia.The puzzle starts with the [blocks] in a neat stack in ascending order of size, the smallest at the top, thus making a conical shape. The objective of the puzzle is to move the entire stack to another [position], obeying the following rules:With three blocks, the puzzle can be solved in seven moves.Autodesk Inventor files uploaded, too!