This tutorial takes you through a simple example of relaxing a mesh using Kangaroo.
The example files can be downloaded from here:
You will need to have the Kangaroo plugin for Grasshopper installed (which can be found here : food4rhino.com/project/kangaroo )
and also the WeaverBird plugin by Giulio Piacentino, which can be downloaded from here ( giuliopiacentino.com/weaverbird/ )
Sorry about the poor audio quality - I need a new microphone!