I'm travelling with DC aged 4 and 6. I've resisted buying a DS or similar and would rather not crack now. What do you do to keep kids entertained on a very very long journey. Eldest can read but youngest learning. Obviously we can have stories, I-spy colouring, dot-to-dots, take a few small toys, but I think we will have exhausted all ideas within the first hour. What do you do with your DC that won't drive other passengers mad?