A 5.5" x 8.5" notebook/journal full of 150 dot grid pages for you to play with 'the three puzzles'. How many different ways can you solve 'The Nine Dots Puzzle'? What is your solution to 'The Tower Of Hanoi'? Can you solve 'Rubik's Cube'?Can you design your own puzzles? This notebook is the ideal medium for you to start with. Perfect size for pocket or bag.