The Worlds Toughest Brainteaser Challenge. In ancient times, the great Oracles proclaimed that whoever solved the mystery the Gordian knot would rule the world. For 400 years, the knot remained a mystery until Alexander the Great solved it and went on to rule great kingdoms. Today the classic tradition of the worlds puzzle continues! This colorful modern variation features just six interlocking pieces but takes 69 different moves to take it all apart. A step-by- step how-to booklet will jump-start the most perplexed AND help you put the puzzle back together if, rather, once it has been solved! Features: Six colorful interlocking pieces, 40-page step-by-step solution book, easy-to-follow reassembly instructions. Ages 8 to Adult Having fun is great way to learn with ThinkFun & Think Fun games. ThinkFun games engage kids and educate kids. They challenge players and nurture the thinking skills important to growth and development. Our games aren’t designed to simply occupy a child’s time. They channel the natural joy and energy of play into a stimulating, family-focused way of building essential thinking skills.