Millie, a 21-month-old orangutan with cerebral palsy laughs after hitting a swinging ball Tuesday with the help of Mary Inhoffer, director of medical rehabilitation for Easter Seals Miami-Dade in Miami. Millie's illness is the only documented case of cerebral palsy in an orangutan, according to Easter Seals Miami-Dade spokeswoman Donna Peyton Lawrence. Since Feb. 8, the charity has provided twice-weekly, one-hour therapy sessions to help her with weakness, poor balance and slow movement. When Millie, who lives at a privately owned Miami zoo called Parrot Jungle, started therapy, she couldn't swing or climb because she was too weak. Now she's sitting up, climbing and is more proactive, said Inhoffer, who works with Millie on her own time. No children go without treatment because of the ape's sessions, Peyton Lawrence said. While the therapy is not part of any specific research on apes, data is being collected to document that primates can be treated as humans when it comes to therapy for cerebral palsy.