GeoCentral Excavation Dig Kit: Dino Skull It's A Dino Skull, You Dig? Yes, you do dig. And when you're finished digging, chipping, and brushing away the 6.75" x 3.5" x 3.87" plaster/earthen block, you're rewarded with a miniature replica of a skull from a Triceratops, Tyrannosaurus, Pachycephalosaurus, or Stegosaurus. When you're done, mount it on the included wooden stand with a brass plaque identifying it. Includes a little wood pick and brush.