Today's daf is sponsored by Tova and David Kestenbaum in honor of Tova's parents, Rabbi Dr. Israel and Rebecca Rivkin, who are making Aliyah today. "We, your children, grandchildren and great grandchildren are anxiously awaiting your arrival in Israel, and wish you many more years of good health and nachat from all of us." And by Jeanne Klempner in honor of her father's 83rd birthday this week, his second bar mitzvah, and for his refuah shleima, Elimelech ben Malka.  According to Rabbi Yosi, one who makes a mistake and sins while performing a mitzva, is exempt from bringing a sin offering. In which cases does this rule apply? A woman can get a lulav from her husband or son and return it to the water on Shabbat. What is allowed on a Yom Tov and what about Chol Hamoed? Why does the mishna specifically talk about a woman? What does this come to teach us? A child who knows how to shake a lulav is obligated in the mitzva of lulav. When is a child obligated in other commandments? When can he be trusted to be careful regarding purity? When can he collect truma? When can his slaughter be trusted? How many days on Sukkot would they take a lulav, erect the arava around the altar, say Hallel, sit in a Sukkah, pour the water libations, play the flute? Regarding lulav and arava, it depends on when Shabbat falls that year. What would they do with everyone's lulavim in the temple for the first day of Sukkot? How is it different from the mishna that described what was done in the synagogue?