Halakhah do Rodzaju 48:6

The Order of Simchat Torah: In places where they do two days of Yom Tov, Kiddush on the ninth night includes Shehecheyanu. The next day, we take out three Torah scrolls. From the first, we read "And this is the blessing" [Deuteronomy 33:1] until the end of the Torah. From the second, we read from "In the beginning" [Genesis 1:1] until "that God made" [2:3]. From the third, the maftir reads the same as the previous day. The haftarah is "After Moses died" [Joshua 1:1]. Rem"a: The last day of Yom Tov is called "Simchat Torah" because we rejoice on it, making a festive meal in honor of the finishing of the Torah. It is customary for the person who finishes the Torah and the one who starts Genesis to make a donation and invite everybody to a party (Tur). It is customary in these countries to take all of the Torahs out of the Ark on Simchat Torah at night and in the morning and to sing songs and praises. Every place should follow its customs. It is also the custom to circle the synagogue's Bimah with the Torah scrolls just like we circle with the lulav. This is all done out of joy. It is also the custom to have many readers from the Torah. We read the same section many times, and this is not forbidden (Minhagim, Rivas"h 84). It is also the custom to call up all of the children to the Torah and to read "the angel who has redeemed me..." [Genesis 48:6]. In the evening, we read the special sections from the Torah that are normally auctioned off, every place according to its custom. It is also the custom that even a child can finish off the Torah, even though there are those who say that specifically a scholar should finish it (Mordechai's small notes). Nowadays when the chazzan does the actual reading, there is no issue (his own opinion). In a place with only two Torah scrolls, we read "And this is the blessing" from the first, "In the beginning" from the second, and then we go back and reuse the first for the section associated with the day. This is done whenever three Torahs are needed but there are only two (found written somewhere).