Product Description:<br><br> The 4Set Zooshine Vantage & Advanced level metal brain puzzles are special designed for the person who want more challenge in puzzles games.<br><br>It condenses Chinese traditional culture with unique creative. Linked together these wire pieces do come apart with the right strategy. Patience is a virtue.<br>The brain teasers are very good toys for parent-child, party games,family entertainment,killing time and office relax.<br><br>Package included:<br>4PCS Advanced Metal Brain Teasers.<br>instruction paper called "challenge guide"<br><br>TIPS:<br>***If you want more fun and Challenge,please DO NOT refer to the solution "challenge guide" at the very beginning.<br>The really most interesting thing is exploring,not the result.