Zooming children of container

I have a container (containerA) and inside that is many child MCs.

I am wanting to zoom the children so that the container still takes up the same space on the screen but is zoomed and I then need to pan around to see all the MCs inside the container.

What I have tried is:

obj.scaleX=1.2;

obj.scaleY=1.2;

but this does not work properly, the whole container zooms and takes up the whole screen (more than it was).

The effect I am trying to acheive is similar to what happens in games like “words with friends” when a tile is laid on the board.

Any help would be appreciated.