How do I Rotate Models?

I have no idea how to rotate a model with a script? Is it done the same way as a brick or not? I have little time let until I ave to release a game, and need to finish. All help appreciated.

Well, it's not exactly the same as a brick.

a = game.Workspace.Model:GetChildren()

for i,v in pairs(a) do
	z = 0
	repeat
	v.Rotation = v.Rotation + Vector3.new(0.1, 0, 0)
	wait(0.01)
	z = z+1
	until z == 40 --Smooth rotation
end