Things to do with young cuzens on a 4hour cat journey.?

ok i am going on a holiday to somer set on monday with 2 of my little cuzen im 15 one of them is 8 and the other is 5. what can i do with them to keep myself but also them entertained? like ino the clics i spy, yellow car no returns all that. but i was thinking of others that had more educational benfits for them also. or really fun ones that u wont get bored of after 5mins thanks alot (: