How to get all children sounds in folder and play at different volume?

Im making this underground music player like a club bunker, and i have added invisible parts covering the enterance and the area. I have a folder with 3 different parts, one at the main entrance playing low audio and area 2 with medium and area 3 which is the club area. I made this script with skip and mute button. The trouble is on line 5 I can't get all of the childrens sound in the folder becuase I don't have a clue yet. The model in line 5 is 3 parts called area with sound parented in it.

local Songs = {
	1876360209,6888740313,786465393,6415424340
}

local SongObject = script.Parent.Folder.Model:GetChildren()
local SkipButton = script.Parent.ProximityPrompt
local MuteButton = script.Parent.Mute.ProximityPrompt

MuteButton.Triggered:Connect(function()
	if SongObject.Volume == 4 then
		SongObject.Volume = 0
		MuteButton.ActionText = "Unmute"
	else
		SongObject.Volume = 4
		MuteButton.ActionText = "Mute"
	end
end)

SkipButton.Triggered:Connect(function()
	SongObject:Stop()
end)

while true do
	for i = 1, #Songs do
		local Song = Songs[i]

		SongObject.SoundId = "rbxassetid://" .. Song
		SongObject:Play()

		repeat wait() until not SongObject.IsPlaying
	end
end