Be sure to know what your bird is chewing on or eating. Rush him to the vet if you suspect lead poisoning. There is hope. A tame Ringneck will not hurt a child. A child can easily inflict mortal damage to a curious bird.
Supervision is important.
Bird Talk has wonderful reports on safe toys. Bird specialty stores have a myriad of toys at reasonable prices. Know what you are putting in his cage. Your baby has begun to develop the personality that will carry through his long life. He should be gentle and quiet.