The ZURU Robo Alive Volcano Dino Fossil Find Dig and Build Surprise Egg is a toy where you dig through a volcanic-themed "dig" and "build" a dinosaur fossil with lights and sounds. You use an excavation tool to reveal hidden fossil pieces, assemble them, and then activate the dinosaur's light-up eyes and roaring sound effect. The egg comes with a "magma" colored fossil, and there are four different dinosaur skeletons to collect: T-Rex, Triceratops, Ankylosaurus, and Stegosaurus. 

Here's a more detailed breakdown:

What you get:

• Surprise Egg:

  The egg contains the "dig" and "build" elements, as well as the excavation tool.

• Volcanic "Dig" and "Build":

  The egg contains a "dig" medium (likely sand, slime, or similar) where you excavate the fossil pieces.

• Dinosaur Fossil Pieces:

  The "dig" medium hides the pieces needed to build one of the four dinosaur skeletons.

• Excavation Tool:

  A small tool to help dig through the "dig" medium and reveal the fossil pieces.

• Dinosaur Skeleton:

  Once built, the dinosaur has lights and sounds. Pulling the tail activates the light-up eyes and a dinosaur roar. 

Features:

• Dig and Build Experience:

  The toy provides a "dig" and "build" experience, allowing children to excavate and assemble their own dinosaur fossil.

• Lights and Sounds:

  The completed dinosaur has a light-up feature (eyes) and a sound effect (roar).

• Collectibility:

  There are four different dinosaur skeletons to collect, making it a potentially collectible toy.

• STEM Education:

  The toy can be used as a tool for STEM education, encouraging children to explore and learn about paleontology.