About this 3D model

The idea is to move all of the disks from one peg to another in as few moves as possible. There are three rules: 1) only one disk may be moved at a time; 2) a larger disk may never be placed atop a smaller disk; 3) each move must be complete and non-overlapping, that is, a disk removed from one peg must be moved to another peg before another disk may be moved. Have Fun!!