On 10 January 1992, during a storm, a container full of bath toys fell off a ship travelling across the Pacific ocean. The container opened and the 28,000 toys, including yellow rubber ducks, were released.

…

We’ll model the ducks as ‘tracer particles’ in the ocean. The term ‘tracer particles’ refers to small objects that move with a fluid without really changing how it behaves. They are very common: examples include leaves on the surface of a river and, fortunately, rubber ducks in the ocean. Our simulations will try to track the amount of these particles in different parts of the ocean.

This website has VERY cool web browser interactive simulations you can try, highly recommended!___