How can I simplify this script?

So I have an instructions GUI with lots of buttons and frames, and the script that makes the frames open and close is extremely inefficient. I have to manually add each frame every time a add a new button to the GUI, and its super time consuming. What I would like to know is if there is a function that can get all the children of a frame except one specific one. Is that possible?

local BUTTON = script.Parent
local TlFRAME = BUTTON.Parent.Parent
local FRAME = TlFRAME.Arbalest
local NAME = BUTTON.Text
local ITEMNAME = FRAME.Itemname

local CRUDECLUB = TlFRAME.CrudeClub
local HUNTINGCLUB =  TlFRAME.HuntingClub
local FLINT = TlFRAME.Flint
local CRUDEBUCKET = TlFRAME.CrudeBucket
local COPPERAXE = TlFRAME.CopperAxe
local COPPERPICKAXE = TlFRAME.CopperPickaxe
local IRONAXE = TlFRAME.IronAxe
local IRONPICKAXE = TlFRAME.IronPickaxe 
local CRUDEBOW = TlFRAME.CrudeBow
local CRUDEFISHINGROD = TlFRAME.CrudeFishingRod
local LONGBOW = TlFRAME.Longbow
local SHORTBOW = TlFRAME.Shortbow
local HUNTINGBOW = TlFRAME.HuntingBow 
local FISHINGROD = TlFRAME.FishingRod
local CROSSBOW = TlFRAME.Crossbow 
local ARBALEST = TlFRAME.Arbalest 
local STEELAXE = TlFRAME.SteelAxe 
local STEELPICKAXE = TlFRAME.SteelPickaxe 
local BUCKET = TlFRAME.Bucket 
local CRAFTINGKNIFE = TlFRAME.CraftingKnife 
local SKINNINGKNIFE = TlFRAME.SkinningKnife 
local LUMBERSAW = TlFRAME.Lumbersaw 
local SLEDGEHAMMER = TlFRAME.SledgeHammer 
local MASONRYHAMMER = TlFRAME.MasonryHammer 
local BLUNDERBUSS = TlFRAME.Blunderbuss 
local FLINTSTEEL = TlFRAME.FlintSteel 
local DYE = TlFRAME.Dye 

FRAME.Visible = false

function on_button1_down()
	
	CRUDECLUB.Visible = false
	HUNTINGCLUB.Visible = false
	FLINT.Visible = false
	CRUDEBUCKET.Visible = false
	COPPERAXE.Visible = false
	COPPERPICKAXE.Visible = false
	IRONAXE.Visible = false
	IRONPICKAXE.Visible = false
	CRUDEBOW.Visible = false
	CRUDEFISHINGROD.Visible = false
	LONGBOW.Visible = false
	SHORTBOW.Visible = false
	HUNTINGBOW.Visible = false
	FISHINGROD.Visible = false
	CROSSBOW.Visible = false
	--ARBALEST.Visible = false
	STEELAXE.Visible = false
	STEELPICKAXE.Visible = false
	BUCKET.Visible = false
	CRAFTINGKNIFE.Visible = false
	SKINNINGKNIFE.Visible = false
	LUMBERSAW.Visible = false
	SLEDGEHAMMER.Visible = false
	MASONRYHAMMER.Visible = false
	BLUNDERBUSS.Visible = false
	FLINTSTEEL.Visible = false
	DYE.Visible = false
	
	ITEMNAME.Text = NAME
	
	FRAME.Visible = (not FRAME.Visible)

	end

BUTTON.MouseButton1Down:connect(on_button1_down)

Sorry retread question I would still suggest using a for loop but with a conditional statement

For I,v in pairs (Frame:Getchilrden()) do
If v.Name ~=  -- item to avoid
V.visible = false
end
end

local BUTTON = script.Parent
local ITFRAME = BUTTON.Parent.Parent
local FRAME = ITFRAME.Hull
local NAME = BUTTON.Text
local ITEMNAME = FRAME.Itemname
local SCROLLINGFRAME = ITFRAME.ScrollingFrame

FRAME.Visible = false

function on_button1_down()
	
	for I,v in pairs (FRAME:Getchilrden()) do
if v.Name ~=  SCROLLINGFRAME-- item to avoid
then v.Visible = false
else I.Visible = true
end

	
	ITEMNAME.Text = NAME
	
	FRAME.Visible = (not FRAME.Visible)

	end
	end
BUTTON.MouseButton1Down:connect(on_button1_down)

So would this work?

That's a pretty simple problem and can easily be solved with a for _, fr in pairs(TlFrame:GetChildren()) do which will do the stuff inside of this and an end to anything inside of this table.

local BUTTON = script.Parent
local TlFRAME = BUTTON.Parent.Parent
local FRAME = TlFRAME.Arbalest
local NAME = BUTTON.Text
local ITEMNAME = FRAME.Itemname

FRAME.Visible = false

function on_button1_down()
	for _, fr in pairs(TlFrame:GetChildren()) do
		if fr ~= FRAME then -- This will prevent the content of the FRAME variable from being changed.
		fr.Visible = false
		end
	end
	ITEMNAME.Text = NAME
	FRAME.Visible = (not FRAME.Visible)
end

BUTTON.MouseButton1Down:connect(on_button1_down)

If this doesn't help you with your problems or isn't what you needed, simply reply in a comment and I'll see what I can do.