Can someone help me figure this out?

My sword keeps falling apart anything I play, I put all the parts in a handle, I know I am suppose weld everything but I didn't know how to make a Weld script, so if there is a easier way can you tell me or if you know how to make a weld script can you tell me?

Weld scripts are quite tricky, I must admit that. It's a shame that ROBLOX does not provide this in their API.

You can integrate the CreateWelds function with your tool API. I provided some standard way of doing this.

local tool = script.Parent

-- user-defined code

function UpdateWeld(part1, part2, c1, c2) --c1 and c2 have to be provided, reading from part1/part2 fails sometimes. yes, strange.
	if part1:FindFirstChild("Weld") then
		part1.Weld:Destroy()
	end
	local Weld = Instance.new("Weld", part1)
	Weld.Name = "Weld"
	Weld.Part0 = part2
	Weld.Part1 = part1
	Weld.C0 = c2:toObjectSpace(c1)
end

function CreateWelds(tool)
	local weld_to = tool.Handle
	for i,v in pairs(tool:GetChildren()) do
		if v:IsA("BasePart") and v ~= weld_to then
			UpdateWeld(v, weld_to, v.CFrame,weld_to.CFrame)
		end
	end
end

--user-defined code

tool.Equipped:connect(function()
	CreateWelds(tool)
	-- user defined code
end)