Are there child safety ratings for cars?

Yes. What you can get is 1. Crash test results and 2. Car seat data. A good place for crash test results is the insurance institute for highway safety @ http://www.Iihs.Org/ratings/default.Aspx . The national highway traffic safety administration is a great place to learn about car seats @ http://www.Nhtsa.Gov/safety/cps . Then you can turn to consumer reports for specific product recs.