This is how you know there is a dinosaur enthusiast little boy in the house. Randomly scattered here and there you stumble across these miniature, pre-historic scenes of violence and mayhem.

Also, when your drive-time conversation is totally dominated by considerations of the relative merits of tyrannosaurs, pteranodons, and raptors.

And don't get him started on the dental distinctions that can be observed between crocodiles and alligators.  He knows them all.