I need help remembering a story/book that I read in elementary school, but I can't remember the name, characters, or a major part of the plot of the story. Here is what I can remember:
Yhere was a boy and girl. They were probably kids and the story started with them figuring out they could communicate with their minds. I believe they run away at some point, but I have no idea what part of the plot this was (it may have been to locate another person or "thing"). I do remember them at a "library" but don't remember why they went there.
I also believe the story ends with them at a carnival, but I'm having doubts that it was there. In the end they meet up with whatever this other person/thing was, and I remember the story saying the other person was in pajamas and possibly even the boy and girl were, but again my memory is sketchy.