Pediatric rehab??

I am currently enrolled in an associate degree nursing program, and I will graduate this spring. I am looking to continue my education, but Im not too sure what in. I have thought about healthcare management, but recently I have been thinking about some of the reasons I went into nursing. I want to help others and work with children; I want to make a difference. Sometimes I get a little nervous about alot of blood and invasive type things, as well (I know, so why did you want to be a nurse for if thats how you feel??).
Basically, I want to know....Is there such thing as a pediatric rehab nurse? One who works with children after illness or accidents, etc. Do they work with developmental abilities? Is this more of a job a physical therapist does? And where do I go from here?

Any help/advice is appreciated!