Hi Fujiflyer
Nipper is now 18 months and have found that when travelling in the Robin that the best way is to put the childseat in the aircraft and secure nipper to this.
Tried just the seat belt and resulted in same game. Seems that when we use the car seat she resigns herself that she will be in there for the duration much like sitting in the car.
Tried headphones but she could not work out where these voices came from without seeing anyone talking to her.
HTH