box animation

Hi, I'm currently studying 3dsmax. Im wanting to do an animation of a cube running along a plane, and have multiple cubes of the same size etc, build up to form a BIG version of the same cube, much like that dice animation (??) i forget who made it. I basically want the cube to rotate from the edge of the face that it currently sits on. I've managed to get this right but for only one rotation on the X axis for example. How do I get the box to continue to rotate from the next edge on the new face that the box lands on, along the same axis?

I hope this makes sense.
hein