Does this contain grit? Do I need to buy that separate?

This was a birthday gift for a 8 year old boy. He loved it as the rocks and fossils were easily identified and he loves his rocks. It is not a polishing device. So you do not need grit. I have seen where National Geographic does offer a small rock polishing kit.

Are any of these toxic or radioactive?

None of the Rocks are Radioactive or Toxic but I don't recommend that you were to eat them. They wouldn't be put in to a kids collection if they were. Plus Radioactive Rocks glow with a black light. So they would be vary easy to spot.

do you actually dig/uncover the fossils?

No, our NATIONAL GEOGRAPHIC Rocks & Fossils Kit is not a dig kit. This is a beginners rock collection.

Does this come with any doubles of rocks/stones? Or is it a large variety?

It comes with a couple duplicates as far as the little rocks go, but it has only one unique fossil. There is a large array of different stones. Definitely worth the buy.

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描述

🪨 Unlock Earth's secrets—one rock at a time!

HANDS ON DISCOVERY KIT - Magnifying glass and ID sheet empower detailed rock and fossil identification
BECOME A JUNIOR GEOLOGIST - Comes with Absolute Expert: Rocks & Minerals, a vibrant 100+ page guidebook
AWARD WINNING EDUCATIONAL FUN - Created by Blue Marble, Toy of the Year winner, blending learning with play
EXPLORE EARTHS HIDDEN TREASURES - 300 authentic rocks, gemstones, crystals & fossils to fuel curiosity
PERFECT GIFT FOR FUTURE SCIENTISTS - Compact, beautifully curated collection that inspires lifelong passion for geology

The National Geographic Rock Collection Box for Kids offers 300 genuine rocks, gemstones, crystals, and real fossils, paired with a 100+ page full-color expert book and identification tools. This award-winning kit by Blue Marble is designed to ignite scientific curiosity and hands-on learning for young geology enthusiasts.