The Maggid of Stanov explained the passuk (Devarim 29:9): “Atem nitzavim hayom kulchem lifnei Hashem Elokeichem,” on tefillah, that “hisyatzvus” means tefillah as it says (Shmuel I, 1:25): “Ani ha’ishah hanitzeves imcha bazeh lehispallel el Hashem.” And the Torah instructs us: Your tefillah “lifnei Hashem Elokeichem” – in the shul, which is a place where the Shechinah dwells – needs to be with “kol ish Yisrael,” and even “your children.” The participation of the youth in tefillah is so important that it is fitting even to make tefillah later for this purposes.
“And as they said in the name of Harav Yosef Hollis, z”l [the Rav of Tisminitz] who would daven later in shul so that the young children would come to answer Yehei Shemei Rabbah and Kedushah and amen” (Ginzei Yosef Nitzavim).
