Describe what Amir and his father do when Amir is 18. What do they take with them?

When Chapter Ten opens Amir and Baba are being smuggled out of Soviet- or Shorawi-occupied Kabul along with other Afghanis. Their goal was to reach the safer territory of Pakistan. Amir still has carsickness at age eighteen, which embarrasses Baba. I don't think they have much with them.