suspend dynamics help please,

trying to prevent a fractured cube from falling apart at least for a few seconds or frames in the beginning. I know how to set it all up but its the logic that doesnt work. I want the cube to break apart and fall because of gravity or because I have a wind force that starts after 5 seconds. however the cube just breaks apart in the beginning. I can suspend the dynamics indefinately but I cant restore it after a few seconds. Can you use wind force to interract with the dynamics in the game engine? thanks

You could parent the cubes to a static object or at least I remember solving similar problem that way.