Continuously monitor childrens properties

Hello guys,

im back with another question. There an object with few hundreds children. At some point through player interaction the variable public bool done = false; of evry child will become true. My intetntion is to monitor all the objects at once through the parent.

Some code for the parent (as i imagine it):

 void Update () {

         if (for(int i = 0; i < children; i++) children[i].GetComponent<Child_Script>().done = true;) {
             Debug.Log ("all done");
             }
         }

What are your thoughts, I reached a dead end of some kind.

Greetings