The Willow Boat River Race has a valuable prize - but to enter, you have to build your own boat with recycled rubbish! Lina and Kurt recruit the Pico twins to help them build their own boat, the Wild Whirlpool. Will it stay afloat? Can the team of four win the prize? The Wild Whirlpool is a story about friends working together to achieve a goal. At a deeper level it is about taking care of the environment.