Starts with a nudge, a poke, a whinge and before I know it ds1(4) and ds2 (2) are killing each other in the back of the car - there will be hitting, screaming, chewing and chomping - possibly within 30 secs of leaving the house. They have now extended this to their double buggy - joy! Tried toys and conversation to distract but nothing doing. I'm thinking getting them to choose one very special car toy each that they only have in the car and if they kick off I pull over and take it away? They're really not great with discipline as they just don't seem to understand it. And if I'm honest its ds2 who is the guilty party.