At the beginning of Chapter 2, Scout is sad that Dill has left, but is excited about? school starting.
the July 4th Parade.
Jem getting his cast off.
Atticus taking them on vacation.

School Starting

Explanation:

if this is to kill a mocking bird, which i'm almost certain it is, Scout is excited about school starting as she has never gone to school before.

(you didn't attach a copy of the poem, but i'm answering as best as i can)

since a simile compares two unlike things using like or as, it kind of gives an item the ability to do something it can't.

example: "the player was like a tiger on the field"

in this sentence, the simile conveys the idea that the player was fast and strong, like a tiger.