The snow falls copiously and we watch the Branston family spend their newfound free time. The kids'-movie antagonists I remember tend to subvert the established order. Snow Day doesn't see it that way, though. The movie roots for Nat as she undercuts and abuses Snowplowman at every turn, eventually committing grand theft auto by stealing his plow and using it to return all the cleared snow to the streets again. At this point Nat ceases to be a gadfly impeding Snowplowman's progress and becomes a deliberate, lawless saboteur.
Snow days are cool.
This is what I mean by saying that Snow Day wants to buck the system. Its children commit quaint but borderline criminal acts that undermine the status quo of suburban society. Something about this is kind of refreshing. Kids' movies rarely offer up such unembarrassed endorsements of truancy. Predictably enough, Claire's supercool clique is incredibly bitchy to Lane, and also predictably enough, Lane herself is secretly in love with Hal.