Invented by a mathematician in 1883, The Tower of Hanoi ring puzzle has challenged monks and mathematicians for centuries. Based on fable from Benares, India, it is believed that when the tower is completely moved the universe will end. Don't fret. There are only 2 holy rules that must be obliged in order to complete the tasks. You don't have to possess magical powers to move this holy wooden temple. Start by moving only one disk at a time and remember that at no time can a large disc be placed on top of a smaller one-the rest is child's play. Dimensions: 3 1/2" x 8 1/4"" x 1 3/8"