I have my mesh which began as a plane and which I have extruded along the z-axis so it looks like a simple narrow block. I've edited the mesh to take the shape of a country with numerous states. In my animation I would like each of states to 'grow' upward from the plane along the z-axis. I've tried placing the object in its initial location at frame 1 and adding the first keyframe, moving to frame 72, extruding and individual state along the z-axis and inserting the second keyframe but this doesn't work. When I go to play the animation the extrusion doesn't return to its initial state at frame 1 and no animation occurs.
Any help is appreciated, thanks.