hey, sorry I don't know much about training (except that I"m pretty sure it's a fellowship after normal ortho training), but I loved it when I got to due it during my 3rd yr clerkship.
We saw a few "skiffy"s (slipped capital femoral epiphysis, can say it, can't spell it), a LOT of CP kids (osteotomies needed as a result of spasticity, moving tendons from extensor to flexor surfaces to allow movement, recommending braces), one or two with spina bifida, kids with hardware from breaks (some non-unions after being done by adult docs), a few hip spicas, also some scoliosis kids.
It's a great speciality, but you gotta deal with parents when you deal with kids. Some of these parents have been through a lot with the kid having CP/spina bifida and they have a ton of questions. If you've got the patience to work with them, you'll do well.