Rotate a mesh within a group to lookAt an element outside the group

I have a series of groups with a child in each (Im using Globe GL which adds objects to the globe in this manner)

I’m trying to get the objects to look at the centre of the globe so they rise from the globe perpendicular, but as each is a child of a group setting child.lookAt(0, 0, 0) just makes it look at the origin of the group so they do nothing.

How can I rotate all of the children of these groups to face the same origin without removing them from their groups?