Help required to achieve this physics/organic animation effect in HTML/CSS/JavaScript Options

[p_gill]

Hello,

This is my first time posting. I'm returning to HTML/ CSS after 6/7 years programming in other languages and I've heard and seen amazing examples in HTML 5.

I'm looking to build a UI where it's possible for the user to spawn/generate and then manipulate in size/shape rectangular blocks of colour, with text elements inside.

I would like to achieve a fluid, organic/physics style of animation between the blocks, much like this example in Flash:

http://www.snappywords.com/

Is this possible to achieve in a browser (without using Flash or Silverlight) and what libraries or plug-ins would be needed?

I'd really appreciate any help to point me down the right path.

Many thanks in advance.