As a kid, I had no knowledge of Cinema. I only relied on Cartoons and Comedies like 'Carpool'. I remember enjoying myself while watching 'Carpool' back in the late 1990's. Now when I saw it on TV after all these-years, When I itself started to watch films like 'Ben Hur', 'Casablanca' etc, I consider this 1996 flick to be a weak effort.
'Carpool' is not a terrible film, but it's not good either. However, Kids of my age back then, enjoyed themselves. In terms of 'Screenplay' & 'Direction', this flick offers nothing magnificent and I can confirm you that the Makers didn't intend to make a 'milestone' film anyway. Their intension was to make Kids laugh, and of what I remember, the kids did.
Arthur Hiller's direction as well as the screenplay offer nothing great. For some reason, Tom Arnold won a Razzie-Award for Worst Actor for his performance in here, while David Paymer delivered a truly good performance. David Paymer is amongst "the" most under-rated actors of his time. The kids did a fine job.
On the whole, A film that never will be talked about, and I guess it never even wanted to be Evergreen.