The brick served them as stone.
וַיֹּאמְרוּ אִישׁ אֶל רֵעֵהוּ הָבָה נִלְבְּנָה לְבֵנִים וְנִשְׂרְפָה לִשְׂרֵפָה וַתְּהִי לָהֶם הַלְּבֵנָה לְאָבֶן וְהַחֵמָר הָיָה לָהֶם לַחֹמֶר׃
בראשית יא:ג
"And they said to one another: Come, let us make bricks and burn them hard. And the brick served them as stone, and the clay served them as mortar."
Bereishis 11:3
Lest we be scattered over the face of all the earth.
וַיֹּאמְרוּ הָבָה נִבְנֶה לָּנוּ עִיר וּמִגְדָּל וְרֹאשׁוֹ בַשָּׁמַיִם וְנַעֲשֶׂה לָּנוּ שֵׁם פֶּן נָפוּץ עַל פְּנֵי כׇל הָאָרֶץ׃
בראשית יא:ד
"And they said: Come, let us build ourselves a city and a tower with its top in the heavens, and let us make ourselves a name, lest we be scattered over the face of all the earth."
Bereishis 11:4
And He scattered them over the face of all the earth.
וַיָּפֶץ ה' אֹתָם מִשָּׁם עַל פְּנֵי כׇל הָאָרֶץ וַיַּחְדְּלוּ לִבְנֹת הָעִיר׃
בראשית יא:ח
"And Hashem scattered them from there over the face of all the earth, and they stopped building the city."
Bereishis 11:8