We took our son for a 12-hour trip when he was about 20 months old. We left
very early in the morning (e.g. 4am), so he continued sleeping for another
3 hours. We stopped for breakfast around 7-8am, and then lunch around 11am-
12pm, then he went to sleep after a while we got on the car again.
Basically, we stopped every 2-3 hours for about 10 minutes: walked around,
had some snack/fun. While on the car, playing music/story, talking with him
. He was fine on the round trip.
But prepare for l