Cast Square: Hanayama Mechanical Puzzle of the Week

Cast Square is a terrific little puzzle at a terrific little price. The object is to take it apart, then reassemble. What's great about this puzzle is that it's virtually indestructible. Your non-puzzle friends and nieces & nephews won't be able to break it. Full disclosure: Vesa Timonen is my puzzle friend from Finland and he designed it. Here's the link.