Meant also to add, to the parent who mentioned DVD players.... brilliant distraction tool, and a good number of parents BYO portable DVDs... especially good if your kid has a Spongebob/Dora/Bob obssession as they will tend to sit there catatonic once that DVD goes on
Just be prepared with something else to distract them at top of descent when you have to switch it off... or there will be
all round!!!