hi, first of all, wishing you all a very happy sankranti. I’m gonna tell you about, what did i do in sankranti vacations.
Blender is a open source software for 3D creation and 3D animations. I spent all time with blender in holidays.
Blender Noob to Pro wiki ( http://en.wikibooks.org/wiki/Blender_3D:_Noob_to_Pro ) is good tutorial for newbies.