In Harper Lee's To Kill a Mockingbird, what is Dill known for, and what are some of his accomplishments and interests?

In Harper Lee's To Kill a
Mockingbird, Dill comes the first summer of the book to visit his Aunt
Rachel. He is short for his age, though he is a year older than
Scout.

Scout believes that under any other circumstances
that Jem would never have looked twice at Dill. However, Dill has been to the movies and
reads, and thus brings an entirely new wealth of ideas for them to role play when they
"pretend."

He
seems to have a limitless
imagination...

When Dill
arrives, he introduces himself and says he has seen the movie
Dracula. Because Dill adds a new dimension to their playing (new
roles, a third person—rather than two), Jem accepts him without
question.

Dill
had seen Dracula, a revelation that moved Jem to eye him with the
beginning of respect.

Besides
the fact that Dill likes to read and likes to play pretend, as do Jem and Scout, Dill is
the mastermind behind deciding to get Boo Radley to come out of his house. The boys also
are masters at developing the "Radley family" game, which entertains them for the entire
summer. Dill is able to get under Jem's skin, though he is younger: for instance, it is
Dill's dare (and the sense that the kids back at Dill's home are braver) that makes Jem
decide to run into the Radley yard and touch their
house.

Dill
got him the third day, when he told Jem that folks in Meridian certainly weren't as
afraid as the folks in Maycomb, that he'd never seen such scary folks as the ones in
Maycomb.

Jem tries to work up
his courage. Dill says that he and Scout will be right behind Jem to save him if it's
necessary. With Dill's nagging and inferences of cowardice, Jem runs up and slaps the
side of the house, running away as if his life depended on
it.

Later in the
novel...

Dill
has declared he will one day marry [Scout], a statement she seems to accept
matter-of-factly.

Dill
quickly becomes like a member of the family; the three are seen together all summer
long. Dill may seem young, and in some ways he
is an innocent—as are Jem and Scout—but he has a wonderful
imagination and is always coming up with new schemes that the adults may not like, but
that Scout, and especially Jem, enjoy.