Linkage to Mitzvah of Ascension to Jerusalem for the Holiday: Chagigah 3a
Whether the Reading is done on Shabbat, or it is moved up or delayed: Megillah 5a [2x]
The Requirement is Dependent upon ability to Teach others: Chagigah 3a
Bringing young children gives reward for the bringers: Chagigah 3a