It means that the boy can't take pictures.
The meaning of this sentence is very clear to say a kind of mockery, is a kind of a kind of blackened called, the head did not grow a camera, the meaning is very clear, that is to say that the head if the head grows a camera, then everything can be recorded, but the head did not grow a camera, that is to say, I simply can not solve this thing, and I do not know what is going on.
Camera
Camera (CAMERA or WEBCAM), also known as computer camera, computer eye, electronic eye, etc., is a video input device, is widely used in video conferencing, telemedicine and real-time monitoring.
Ordinary people can also talk and communicate with each other via webcam on the Internet with images and sound. In addition, people can also use it for a variety of popular digital imaging, audio and video processing.