What it is: The Smithsonian site is full of amazing activities and interactives.   A few weeks ago I stumbled on their Virtual Dinosaur Dig interactive and immediately sent it on to our second grade teachers who are teaching a dinosaur unit.  During the Virtual Dinosaur Dig, students act as paleontologists who find a virtual fossil, learn how vertebrate paleontologists excavate the specimen, learn about the anatomy of the specimen and where it lived, view an illustration of what the specimen may have looked like, transport the speciman to a museum, and reconstruct the speciman (a stegosaurus) at the museum.  Each…