Our grandson is one year old. He rarely smiles, almost never laughs. Photographs of him show a blank expression in his eyes about half of the time. He rarely cries, and is a good baby. He is growing normally, and is a good eater. He has started walking and can be very focused on where he wants to go. He shows great interest in his toys and books. But the lack of smiling is worrisome to us. If anyone points a camera at him he stares at the camera without smiling. He is loving and sweet, but we are concerned that something may be wrong, and don't want to bring it up to our son and his wife. Are we being anxious over nothing?