Hi Chirone. Thanks for replying!

I am using the default turbulence, but it always works on smaller numbers of cubes so I was assuming that turbulence wasn't the problem.

Have you tried making a solid block of cubes like I was talking about? I just tried making 100 duplicate cubes just using the "duplicate special" command and making them along the x axis so they are all in a straight line, and that animates fine with dynamics and turbulence.

The problem arises when I try to make a solid block of dynamic cubes that are aligned exactly with each other; so if I applied gravity to them they would remain stationary until disturbed by turbulence or a moving dynamic object.

Personally, my suspicion is that the problem is in the way I'm making the block; using special duplicate over and over again. Is there a better way to make a solid block?

Thanks!