Mine love taking a teddy each and some toy cars they do also have a tablet each for the last hour of the trip a lot of the time they do sleep most of the way, or we have sing song wheel on the bus is a hit while in the car, they do like snacks while in the car too
New books, stickers, softball, anything that you can stick on the window. (I'm giving him one by one with long breaks. He doesn't know more things will come...) So I win time. And favourite snacks as an emergency. Definitely keep breaks when he can run around.
BTW on Pinterest, you can find families sharing their own experiences. I found it very useful.
Busy books, pop it’s and a tablet for when everything else fails😂 also snacks!
Whatever you choose, consider the fact that in the unlikely event of an accident, it could fly into little one's face at speed, so best to choose things that are fairly soft / lightweight 😊