My baby started crying uncontrollably in her Graco SnugRide starting at around 3 months. I would stop the car, take her out, look around. I never found anything wrong with the seat itself; and she would stop crying as soon as I held her. I tried talking to her, telling her we were almost home, etc. Nothing helped. Finally someone suggested playing baby/kid's music for her. I got a few cd's and that did the trick. I think as she got older, she just got bored in the back by herself. She definitely has her favorite songs. I play Raffi and this mix of children's music I bought from Target. When she is tired, the music helps her go to sleep in her seat. Now she is 11 months. I still have her in the Snugride eventhough I just bought the Britax Marathon. She hasn't outgrown the Snugride (in terms of the height and weight specifications) and I just love being able to take the whole seat out when she is sleeping. I do have to admit, I am going a bit nuts from listening to her music!!! Hope this helps.