Our daughter is now 6mo and we would take the doors off and roll the back window up, leave the top up and back side windows in(to keep the sun off her)from about a month on. We would also put the canopy/awning/cover thing up on her carseat to help block more wind, and she loved it! Now we wouldn't drive interstate, just back roads. The doors off gave my wife and I that "jeep feel", but the top up and side windows in kept the sun off her. Just make sure to keep extra warm clothes and blankets for her in the jeep to!