I have a 4year old and we too have been obssessed with dinosaurs since he was 2. I see my son's future in this kid. Maybe you could get Harrison the dinosaur expert tickets to the dionsaur park in New Jersey; it had its first year this year.I bet he would get a kick out of it. The park has life size anomatronic dinosaurs! I plan on taking my son this spring. The park is only open for a few months a year.