as a healthy alternative could use raw broccoli as good ole fashion "dinosaur trees", as sweets could get some of the easter egg candy that should be going around soon and it could be "dino eggs".... tyson's dino chicken nuggets? or i have a crust sandwich cutter in the shape of a long neck dinosaur, you could make sandwhiches!
That sounds like a cute theme. Those giant jawbreakers would look good as dinosaur eggs. Sorry that's not much help haha. Also if you do a salad buffet you could say something for the herbivores and then carnivores on the meat stuff.
You can make dinosaur footprint shaped sandwiches, make veggie platters in different dinosaur shapes, etc. And cut out dinosaur footprints and then have them lead to different treats for the kids to find.