Collapsing stack of boxes

Hello,
I am trying to figure out a great way to animate a tower of indvidual boxes
stacked upon each other falling down. I want to animate a sort of "domino
effect" of boxes collapsing down to the ground starting from the highest
boxes down to the last boxes at the base of the tower.

I experimenting with  noise controllers, volume selects, bomb, and reactor. I
think I'm close to solving but I could use some better tips... Please help