How to make ALL identical children function at once?

For a bit of context, I'm trying to make a bell/alarm system for a School game. I'm trying to make identical speaker models play the sound all at once when a button is clicked. I was able to get one speaker working but then the rest won't emit the sound.

I think the issue has something to do with looping, and perhaps the GetChildren instance? I read the Devforum articles on both, but since I'm still a bit stuck I can't be sure. I have only a rudimentary knowledge of scripting, so some suggested reading pertaining to this subject would be incredibly helpful and appreciated!

Essentially, how the models are set up is as follows

• SpeakerSys (Model)
  • Model1 (Model containing play button.)
    • Speaker (Model with Multiple Clones within the parent model)
    • Center (Part)
      • Bell (Sound)

The play button's script is currently this:

function onClicked()
	Game.Workspace.SpeakerSys.Speaker.Center.Bell:Play()
end

script.Parent.ClickDetector.MouseClick:connect(onClicked)

So in short: What functions should I familiarize myself with in order to understand how to script what I'm trying to achieve?

You can loop through all children of whatever the parent of the sounds are and Play each one of them

for i,v in pairs(Speaker:GetChildren()) do --I assume the Sounds are in Speaker?
     if v:IsA("Sound") --check if the current value is a sound
          v:Play() --plays v if it is a sound
     end
end