KHANacademy about effect overview in ANIMATION

Helloo
Here I will discuss one very interesting web named KHANacademy. If you want to find information about some of the fields that you want to know such as mathematics, physics, chemistry, biology etc.
But here I'm interested in one field of animation which makes effect like water, smoke, dust etc.

 in the video above explains how the complexity of making the effect on an animation as the water we have to make the particle one by one to many and will look water or water splash effect. like this

from particle 

so the particles wave .

it is very complicated to make effects like that, but very exciting. if you want to look at the link you can see it in this link  https://www.khanacademy.org/partner-content/pixar/effects/particle/v/effects-overview?ref=Pixar_Recommended_videos