The Torah begins the narrative discussing the sin of the Dor Haflagah, generation of the dispersion. Everyone assembled under the leadership of the evil Nimrod, self-proclaimed king of the world, to build a tower ascending to Heaven. From this vantage point they planned to wage war against the Almighty. It seems, therefore, superfluous to mention their comments of, “Let us make bricks.” Do the technicalities of the development of the tower carry any significance with regard to the sin? It is clear that Bavel/Iraq is — as Rashi notes — situated on a plain, where there are no stones available…
