I need help with a script?

You could use a recursive function.

local remove = {} 

local function shouldRemove(name)
    for i2, v2 in next, remove do
        if tostring(i2):lower() == name:lower() or tostring(v2):lower() == name:lower() then
            return true
        end
    end
    return false
end

local function scan(v)
    for i,v in next, v:GetChildren() do
        if shouldRemove(v.Name) then
            v:Destroy()
        end
        scan(v)
    end
end

scan(Workspace)

Make sure you put the names of things you want removed in the remove table on line 1.