We had and still have this problem occasionally..we tackle it by...driving at night when we go away (she sleeps the whole time), sing songs, put on her fave tunes and put her car seat next to the window then point things out like cows, cars, people, water, grass etc and just ramble on about things. Toys are ok but due to her relatively short attention span- do not last long so we keep giving them till we run out hehe...goodluck, its not easy, especially when they are little