Live the experience of being a real paleontologist! Experience the fun by carefully excavating the skeleton from the fossil block using the tool and techniques of paleontologists. Manufacturered by IMEX. Hidden inside of each plaster rock you will find the fossil of the dinosaur hidden away inside. Great for Classrooms or Party Favors! Intended for children Ages 4+ Set of 12 Dinosaur Fossil Excavation STEM Science Kits.