Florian Witzel with this video as a brief description of how to rig and animate growing objects in a code-less and simple fashion using softimage. All the tools you’ll need for the rig are curve deformations, lattices, smooth operators and cluster constraints. For the complete tutorial go to the autodesk area. (registration required)
Growing Grapes Veins and Bottles – Rigging and Lighting from Florian Witzel on Vimeo.