To get to educational age
He reached the age at which it was necessary to begin educating him to do the commandments, such as the age of four to six.
("Amar said: All-to-the-greater the little ones. And he said: Women and servants and little ones are exempt from the Sukkah! - La Kashya: As here - with a little one who has arrived for the training, as here - with a little one who has not arrived for the training. A little one who has arrived for the training of the children of Darbanan is he!" - Sukkah Kohach 2)
Translation
Expression (Hebrew)
הִגִּיעַ לַחִנּוּךְ, הִגִּיעַ לְגִיל חִנּוּךְ
Definition (Hebrew)
הִגִּיעַ לְגִיל שֶׁבּוֹ צָרִיךְ לְהַתְחִיל לְחַנֵּךְ אוֹתוֹ לַעֲשִׂיַּת מִצְווֹת, כְּלוֹמַר לְגִיל אַרְבַּע עַד שֵׁשׁ לְעֵרֶךְ.
("אָמַר מַר: כָּל-לְרַבּוֹת אֶת הַקְּטַנִּים. וְהִתְנָן: נָשִׁים וַעֲבָדִים וּקְטַנִּים פְּטוּרִין מִן הַסֻּכָּה! - לָא קַשְׁיָא: כָּאן- בְּקָטָן שֶׁהִגִּיעַ לְחִנּוּךְ, כָּאן- בְּקָטָן שֶׁלֹּא הִגִּיעַ לְחִנּוּךְ. קָטָן שֶׁהִגִּיעַ לְחִנּוּךְ מִדְּרַבָּנַן הוּא!"- סֻכָּה כֹּחַ ע"ב)