RE: What entertains your little ones in the car?
DS likes the Magna Doodle, looking for trucks and Leapfrog's Baby Tad. Baby Tad stays in the car. We also have board books. One other thing that DS likes (although this would only work if your son is still rearfacing), is to throw a ball against the back seat. It bounces back to him and he throws it again. Also, sticker books occupy him. DS can't always get the stickers out originally, but once they are on the page, he can generally take them off and put them somewhere else.
Mommy to Justin (13 years) & Ashlyn (8 years)