It is time to put your little grey cells to the test with these slick new brainteasers from the Thinking Panda range. With over 250 puzzles of Codebreaker & Sudoku spanning from the relatively straightforward to the pencil chewing, brain crunching variety, you're guaranteed to find something you like. A handy portable size Quick-to-Solve Codebreakers is an entertaining pastime you can take along with you wherever you want.