Stop and resume play of child mcs

so i need to make a play/pause button on my animation, i can use stop(); to stop the main timeline. i cna use intro.stop(); to stop a movieclip with the instance name intro that is placed on my timeline.

but can I stop every single movieclip (in all different levels) that are in my timeline?

if not, how can i stop movieclipA which is inside movieclipB which is on the main timeline?