Loop All Transform Children (not deep scan)

children.cs

// loops only first level
foreach (Transform child in transform) 
{
  Debug.Log(child.name);
}

// loop all recursive https://forum.unity.com/threads/loop-through-all-children.53473/#post-340519
void TraverseHierarchy(Transform root) 
{
  for (Transform child in root) {
    TraverseHierarchy(child);
  }
}

// Best, loop all with getcomponentsinchildren http://answers.unity.com/answers/287672/view.html
 Transform[] Children = GetComponentsInChildren<Transform>(includeInactive:true);
 foreach (Transform child in Children) {
     // whatever
 }

// activate all parents starting from child
Transform rootParent = someChildTransform;
while (rootParent != null)
{
    rootParent.gameObject.SetActive(true);
    rootParent = rootParent.parent;
}