I've been having fun with a very simple scripted prim idea. Take, one scripted Mighty Prim, copy it as many times as you like, position the resulting blocks where ever you want, then chat
/999 fixClick on any of the blocks and they'll all collapse in a heap. Wait for 20 seconds and they re-build themselves into your original shape. Simple huh?
So, you can go from this:

to this:

and back again just by clicking and waiting.
Re-position everything and type
/999 fixagain and it'll remember the new set of positions as well, cycling round the saved positions after each collapse.
Repeat at will...