ChildAdded on a player's character not working?

Hello, i am trying to do an script that prevents more than 20 parts or objects being added to a character, but ChildAdded does not work, it gives no errors, Can i get some help please, i tried to move it but nothing, and the for i,v in pairs does work. :/.

		local Chara = plr.Character
		local Total = 0
	Chara.ChildAdded:Connect(function(a)
		print("CHILD ADDED")
		print("and child's name is "..a.Name)
	end)
		for i,v in pairs(Chara:GetChildren()) do
			if not  v:IsA("Accessory") and not v:IsA("Pants") and not v:IsA("BodyColors") and not v:IsA("ForceField") and not v:IsA("Shirt") then
				print(v.ClassName)
				print("can go")
			Total = Total+1
			end
		end

i was creating a part with a local script..