Im not sure where, but my MIL found some car amusement thingys that strap under the car seat...and has dangly things bub can stare at or play with.

I have one for my 1 year old and it keeps her happy.

Maybe try some toys stuck to the window (with suction caps...ive seen the toys in Kmart and Target), music.

DD2 hates the car too....and we do alot of travelling to NSW so im hoping she grows out of it!