Dill is playing the less important roles, while Scout is getting better or main roles. It shows a shift in the group dynamic and Scout's rising position in their playtime.
their imaginative games were no longer fun, because they kept repeating the same stories and characters over and over again—so the excitement was gone.
if he tried hard enough
To humiliate one, especially by reminding one of a mistake
to cause something or someone to leave by pursuing or threatening them
Someone says they nearly died after eating pecans during their first school year. People believe Boo Radley poisoned them and left them on the school’s side of the fence on purpose.
Now there’s someone else in the family who is big enough to take over the farm work, so I won’t have to miss school anymore.