Hanayama's S&S brainteaser dates back to the British puzzle craze during Victorian times. The elegant puzzle pieces may look simple, but solving the puzzle is more complicated than it looks. Your goal is to separate the twisted S shapes. One key is to remind yourself that these "S" shapes may look like twins. but are they really identical? Once you've solved the puzzle, can you put it back together again? This cast metal puzzle designed by Nob Yoshigahara is considered difficulty level 3 (moderate). Measures 4.48'' x 3.07'' x 1.88''.