> I don't want him going close to the cars because they've LITERALLY been pumping out pollution for 10-15 minutes (those early spots are very coveted). I have to tell my son to hold his breath when we bike on the empty sidewalk past these idling cars.

social-interaction problems aside, why are the cars idling? seems like the school/city would have an ordinance prohibiting that

So glad to live in a country where you'd get fined for that :)