CmdrDuh, and Cheese Grrrl, as Crank Says :why explode?
The Blocks you are making Dynamic, should function EXACTLY as you desire with no use of Weapons of Blocks Destruction. Add Alignment, Scale and Move paramaters to the nested pieces, and put the TNT back in the shed, at least until Wile E. Coyote shows up that is.
Cmdr, do I need to come down to Tucson and school you on this?
Cheese Grrrl, as implied in you last post, you would be better served by placing these blocks on a tool pallet, in my world the 'tool' of last resort is EXPLODE, the manner you describe is akin to puttin socks on over ones shoes. It may work for you only it isn't exactly as efficient as it could be by placing only the objects one needs, and erasing nothing. For your dining room table example, you will want to enter a 'fixed' stretch value for the leaf, and various visibility states for the guest chairs to appear or disappear as required.