OH!!!
A thousand apologies! I thought that the Sony model was simply shown in its closed position. I didn't realise that such a small model wasn't a portable one. (I really must learn to open a bottle before I start typing. I only seem to make silly errors when I'm sober!).
Perhaps some of the tips here will help:
http://flyingrugrats...._plane/op_topic10.htm
Chris
PS: Sometimes just reading stories to youngsters can keep them quiet (and you sane) for long periods. One of the best trips I had on Eurostar was when the Mum in the seat in front of me was reading stories (all of the way from Paris to London) to her two young kids. The children loved them - and so did ! ;-)