How can I go through models efficiently without for loops?

I have a model and inside that models is four more models and inside those models are bricks , and inside some of the bricks have clickDetectors, now I could just put a script in each clickDetector but I don't find the efficient. How could I make all clickDetectors work on one single script without having to do like three for loops?

I tried this, it works, but I don't think its very efficient.

for i,v in pairs(workspace.Mannequins:GetChildren()) do
	for d,g in pairs(v:GetChildren()) do
		for p,n in pairs(g:GetChildren()) do
			--code
		end
	end
end

I would do this on the client and use player.Mouse.Target, but I wish to keep this code on the server to it can't get stolen (FE is ON)

Here you could use a recursive function, there is some useful info about it on the roblox wiki here.

Here is the code you could use:

function findDescendants(parent)
	for i, v in pairs(parent:GetChildren()) do
		if v:IsA("Part") then
			if v:findFirstChild("ClickDetector") then -- make sure the name here matches the  name of the clickdetector under the parts
				v.ClickDetector.MouseClick:connect(function()
					-- what it should do when it is clicked
				end)
			end
		elseif v:IsA("Model") then
			findDescendants(v)
		end
	end
end

findDescendants(workspace.Mannequin) -- refer to the first model

Hope this helped! If you have any questions please do not hesitate to let me know.