Have him watch Disney's movie "Dinosaur", it may help, My 5 yr old loved/loves this movie from the time he was 3 this was the only movie he would sit through from beginning to end. I like it as it has some good effects for the system \:\)

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70