I Dig Bugs: Amber Fossil ExcavationDid you know that amber is the fossil of pine tree sap, from around 40 million years ago, which dripped out of the tree and hardened? Sometimes small plants or animals are found trapped inside the amber and are perfectly preserved, just as in this I Dig Bugs: Amber Fossil Excavation Kit. Includes realistic sand block, steel tools, glasses, full color fact poster and necklace string for option to wear the amber nugget.Ages 6 and up.