We have Model 3's reserved for both of our kids. However, as soon as Tesla updates the S, I'll be ordering a new one. Given that, I'm thinking about giving my oldest son my 2013 S. Anyone know of a way to limit the speed, besides valet mode? We also need to somehow be able to log in to see where the kids are without them having the ability to control our cars, without logging in and out of our apps. Anyone else have kids with a Tesla? If so, what have you done?