DS1 is 2.5, and has a slight language delay, and some trouble communicating. My twins are 9 months, and when I'm driving, especially if I'm talking to DH/any other passenger, DS1 pinches/hits/pokes whichever baby is next to him. They are all is rearfacing seats. I've tried tightening his straps so he can't lean right round but he has long arms and can still pinch their feet.
I've tried bribery, explaining, threats, shouting, rewarding good behaviour, all to largely no avail. What do I do if he's attacking the babies whilst I'm driving???