Kids and "kids at heart" can have fun solving these beginner Sudoku puzzles. Four difficulty levels, illustrated with four friendly robots, provide hours of portable entertainment - no batteries needed! This big 8.5" x 11" book has lots of room to write and strong paper to survive erasing. The first "Robo-Dog" section includes 36 4 x 4 grids. A sample puzzle with a brief description introduces the basics of Sudoku and shows how to solve the puzzle. These mini puzzles are designed for children 6 and older. They are a good warm up for the rest of the puzzles in the book. The second "Droid" section adds a bit more challenge with 48 6x6 puzzles. The introduction shows a sample 6x6 Sudoku and steps to solve it. This format lets kids 8 and up practice their reasoning skills and prepare for the remaining traditional size Sudoku puzzles. The third "Simple" section has classic 9x9 girds. These 48 puzzles are standard Sudoku at its very easiest. The final "Easy" section contains another 48 9x9 puzzles. These are normal easy Sudoku puzzles. After completing this section, you are ready for any easy level Sudoku book for adults.