Obviously gentle handling, a sick bag and having another adult aboard are fair suggestions.
For the first trip maybe, then you know if they like it....
Another thing about the proposed trip of mine to the UK is that SD jr gets bored now by more than about 4-5 mins of straight and level.....
all I hear is
"can we play with that cloud over there" or
"can we go sideways again" or
" can we go and see that boat/tractor/lorry etc.."
the latest being...."can I have a go now..."
...Im telling you, anyone following one of my flights would think I had had a few too many with my less than direct progress...

Regards, SD..