Puzzleology Tough Puzzles for Kids Author:Des MacHale This fun book of puzzles is specially created for kids by Des MacHale. There are several of each type of puzzle, of varying difficulty. From quick puzzles that will take a couple of minutes to logic problems that will need hours of work, each puzzle is graded into levels of difficulty. Puzzleology includes picture puzzles, mazes, math tests, la... more »teral thinking, visual reasoning puzzles, plus spatial problems with solutions at the back. Just how tough and smart are you?« less