My 14 months old son tends to have car sickness, getting sweat and vomitting. It just started when he came back to HK after spent 2 months abroad. During that 2 months, he didn't have rides so often. However, when he did, that was quite a long distance, say over 1 hour. Can anyone pls. tell me how to deal with it? He is just so poor screaming and exhausted in my car!!