That would be some symptoms. The test for RA are often times negative in children even though they may still have the disease. Pain is probably the number one symptom. If a child has arthritis, even a small child, they will tell you the pain is in the joint ONLY. They will not wave from that and you can't persuade them to say the pain is in the muscle nearby. They may have a hard time walking without pain and eventually they can have contractures of the joints. They have a hard time using their hands, especially in cold, damp weather and often times have weakness as well.
Symptoms of JRA can include, fever, chills, rash, swelling and/or stiffness in joints.