There are few more effective ways of passing a rainy Sunday afternoon than doing a big jigsaw puzzle. But what if there was a prize at the end of it? That’s what Australia’s Colenso BBDO and cheese brand Mainland offered to those who took the time to complete 2000-piece jigsaw puzzles. Put the last piece in place and, lo and behold, the giant puzzles became discount vouchers for tasty Mainland cheeses. A relevant use of a classic medium, because a good cheese – like a challenging puzzle – requires time. Plus, of course, you could always post your finished puzzle on social media for bragging rights. Now say “cheese”!