Leuk the Duck is a mascot for Challenge, and has become an important tool for educating children about cancer. Leuk has become a well-recognised item in golfing circles around the world, and has become synonymous with providing support for children with cancer. 

Golf fans will see Leuk the Duck driver covers and putter covers on the bags of PGA Tour players Robert Allenby and Jarrod Lyle. Both of these players also proudly wear Leuk the Duck pins on their caps for every round.