The Viking Puzzle Box has quite a unique maze mechanism, wildly different from other puzzles in a similar family. In addition to metal pegs and sliding panels, there are four spinning wheels; all these moving parts must be carefully calibrated and adjusted in the proper order to find the solution and open the box, revealing the empty space inside. The clear back to the Viking Box provides a teaser for anything you might hide inside - you can see it, but it remains just out of reach until the puzzle is solved!