Most children are fascinated with dinosaurs, and our boys are no exception. However, when David was three years old, he kept having recurring nightmares, from which he would awake screaming and generally require staying in bed with us, about dinosaurs.
To complicate matters, he kept begging to watch Jurassic Park, having seen the dinosaur pictured on the DVD case. Of course, given his nightmares (and having some negative leanings toward showing somewhat-violent programming to small children), we did not grant his request.
But the nightmares continued for weeks. Finally, I reasoned, he was already having nightmares about the dinosaurs, what harm could there be in letting him watch Jurassic Park? As I recall, we did skip over the scene where the T-Rex attacks the jeep with the kids in it.
After watching the film (actually, after watching all three JP films), his nightmares went away. Go figure.