The person with the special need discovers how to cope and overcome his/her disability.
Or the people around the person with a special need learns how to accept and better support the person with the special need.
However, kids with special needs don't want to only read books about their challenge. They want to see themselves talking to ghosts, feeding unicorns, and being basketball players, just like their peers. Nor should we only present these two themes to typically developing children. When I created the STAR POWERS series which is about a second grade who wants to be an astronaut and uses a wheelchair. I wanted Star's wheelchair to just be a part of her like a leg or an arm. In stories, writers don't constantly mention that a character has a arm or a leg. It is just a part of the character. I wanted STAR POWERS to be about a girl who loved space and not about a girl who uses a wheelchair.