I'm sorry your son is having a difficult time with his dad being gone. My sister in law's husband also works on the oil rigs (they live in texas too) and she often has a hard time with her little ones missing their dad. My husband is in the military and when he's gone we try to keep in contact with computer/webcam and also he reads books and makes dvds for the kids to watch. I'm sure your son will begin to predict his dad's schedule and will become easier for him to deal with the change but until then, good luck!!
