18 Sets different styles metal puzzles rank from easy to difficulty
Very good parent-child games,party games,office toys for relax and killing time
Good for creative thinking and improve your patience, intelligence, IQ & EQ
Metal brain teaser condenses with Chinese classical culture, quite interesting
Tips: If you want more fun & Challenge,please DO NOT refer to the solution "Challenge Guide".The really most interesting thing is exploring it,but not the result
