Open the box.
This one will take some mental thought to work out how to make the wheel in the middle move freely. A very nicely made sequential puzzle that will definitely have you stumped as to how to solve it. This is the puzzle box version of the original Steuerrad, and this one will allow you to open the box once you solve the puzzle. Made by Jean-Claude Constantin, who lives in Germany, where he designs and manufactures many different wood and metal puzzle, as well as magic tricks.