These brain puzzle posters are an advertising campaign created by JWT, a Dubai-based advertising agency, for chocolate brand Kit Kat’s mini bars. So while you take a break with a Kit Kat, you can do a quick bit of brain gymnastics like completing a maze, solving a crossword or a Sudoku puzzle.

I cannot help but think that it might take more than one mini-bar to get through the brain gymnastics, but I guess that is the whole point with advertising campaigns: to make you want more!

In fact I could do with one right now, thank you.