I know it may seems silly but I genuinely don't know whether I should be constantly intervening when DS (6) and DD (3) are arguing. Obviously if it gets rough I step in but should I let them just get on with it sometimes? The worst times are when they are stuck in the back of the car and we will have a long journey coming up soon. We have plenty of games planned along with story CDs but one of them (usually DD) is bound to start winding the other one up and I really don't want to spend the journey shouting or telling them off. Does anyone have a good sibling book/advice to recommend? Thanks.