How do I randomly select a part? [Unsolved]

I want a player to be teleported to a random part in a model. I tried this but it doesn't work:

-- Note this is a fragment of a script that works with normal positions
game.Players.LocalPlayer.Character.Torso.CFrame = CFrame.new(math.random(game.Workspace.Spawns:GetChildren().Position))

game.Players.LocalPlayer.Character:MoveTo(Vector3.new(math.random(game.Workspace.Spawns:GetChildren().Position)))

Hope I helped!