I created this to mess around with some of the new Unity 5 features like the new Physically-based Standard Shader, Real-time Global Illumination, and the PhysX 3.3 physics engine. I also experimented with a bunch of the Image Effects in the Standard Assets to make this underwater scene look the way it does.
The balls that are spawned and then followed around the scene have some basic logic setup to cause them to scale up by 101.2% when they collide with another ball. The camera moves on its own, so there is no user input required to check out this short scene.
Enjoy The Show!