Have them lead up to your entry way. Decorate the table with large rocks, green plants and plastic or paper dinosaurs. CAKE Use a sheetcake frosted with brown chocolate icing. Decorate by making a volcano, plastic trees and dinos. Crumble Oreos for dirt and have blue frosting for water.
FOOD Cut out dinosaur shaped sandwiches and cookies.
Have red punch for Lava Juice. Bury these in a sand box or other designated area. Have the kids dig for dinosaur bones. Or use real bones. Save bones and boil them for an hour to get all the meat off.