Weld

local prev
local parts = script.Parent:GetChildren()
for i = 1,#parts do
    if (parts[i].className == "Part") or (parts[i].className == "UnionOperation") then
        if (prev ~= nil)then
            local weld = Instance.new("Weld")
            weld.Part0 = prev
            weld.Part1 = parts[i]
            weld.C0 = prev.CFrame:inverse()
            weld.C1 = parts[i].CFrame:inverse()
            weld.Parent = prev
        end
        prev = parts[i]
    end
end
wait(3)
script:remove()