At first you might think this is the same as other cross puzzles you've seen before. ...It's not! You might also think it does not look very difficult to take it apart. ...It is! And once you have it apart you might think it will not be very difficult to put it back together. ...You are wrong! This, of course, is another masterpiece by puzzle designer Wil Strijbos. If anyone can take a straightforward puzzle (as if a puzzle is straightforward anyway...) and make it even more puzzling, then Wil is the designer to do it.??Made of precision quality, aircraft grade, brushed aluminum. It works well as a paper weight even if you can't solve it. Happy Puzzling!