This project, the Tower of Hanoi, is a puzzle, where you must move the stack of disks from one tower to the furthest tower from the stack. You are only allowed to move one disk at a time and cannot stack a larger disk on top of a smaller disk. All the disks and base are included in the stl file and should be easily accessible. You may need to drill holes in the center of the disks, if your holes have shrunk. 

The total price for this in filament is 60 cents (8.12 mm / ~24g), but would normally cost an average of $15 if purchased online, so you save $14.40!