Free Online Hard Mazes. A set of 10 challenging mazes in a variety of shapes. Maze Drawing Book Art Maze (source : pinterest.com) Round mazes rectangular mazes hexagonal mazes and more. Hard mazes . Lots of mazes to try out. Note that these suggested ages are just a ballpark. Mazes enforce stronger connections in your brain which result in better memory sharpened problem solving skills enhanced spatial reasoning and its even said to improve your IQ. All of the mazes in this category are more difficult because the grid is. The book are in PDF format and need the Adobe Acrobat Reader to view or print. Each type of maze has 25 mazes to print from. Each book contains 20 mazes. Difficulty Printable Mazes List. Use arrow keys or click and drag. Hard Mazes in PDF format. Just Download Print Any Book Below. Not only are they a fun little project to get through they benefit you in many ways. Super-Tough Mazes by KrazyDad. If you like these mazes also chec...