Evolution of the beaded ball

My herd of beaded balls has become too big by now and so I chose representatives of every type of them and it occured to me that it would be nice to make something like this. I put a single bead as the 1st stadium so there are more of them. They were not made in this order, though. I made the green one first, then the pink one, the big one and the silver one quite recently.
You could have seen all these in my gallery before, except the small silver one.