---
product_id: 257611799
title: "NATIONAL GEOGRAPHIC Starter Rock Tumbler Kit - Durable Leak-Proof Rock Polisher for Kids - Complete Rock Tumbling Kit - Geology Hobby Science Kit, Rocks and Crystals for Kids, A Great STEM Activity"
brand: "blue marble"
price: "KSh33724"
currency: KES
in_stock: true
reviews_count: 5
category: "Blue Marble"
url: https://www.desertcart.co.ke/products/257611799-national-geographic-starter-rock-tumbler-kit-durable-leak-proof-rock
store_origin: KE
region: Kenya
---

# ½ lb rough stones with 9 gemstone types Leak-proof, rubber-lined barrel Durable motor for multiple batches NATIONAL GEOGRAPHIC Starter Rock Tumbler Kit - Durable Leak-Proof Rock Polisher for Kids - Complete Rock Tumbling Kit - Geology Hobby Science Kit, Rocks and Crystals for Kids, A Great STEM Activity

**Brand:** blue marble
**Price:** KSh33724
**Availability:** ✅ In Stock

## Summary

> 💎 Polish your passion, rock your world!

## Quick Answers

- **What is this?** NATIONAL GEOGRAPHIC Starter Rock Tumbler Kit - Durable Leak-Proof Rock Polisher for Kids - Complete Rock Tumbling Kit - Geology Hobby Science Kit, Rocks and Crystals for Kids, A Great STEM Activity by blue marble
- **How much does it cost?** KSh33724 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.ke](https://www.desertcart.co.ke/products/257611799-national-geographic-starter-rock-tumbler-kit-durable-leak-proof-rock)

## Best For

- blue marble enthusiasts

## Why This Product

- Trusted blue marble brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Endure:** Robust motor and leak-proof design ensure quiet, reliable tumbling session after session.
- • **Complete All-in-One Kit:** Includes stones, 4-stage grit, and 5 jewelry fastenings—everything you need to craft wearable art.
- • **Guaranteed Satisfaction:** Backed by National Geographic’s trusted quality and customer-first promise for worry-free gifting.
- • **STEM Learning Meets Fun:** Step-by-step instructions and a colorful guide turn geology into an engaging educational adventure.
- • **Effortless Gemstone Creation:** Transform rough rocks into polished gems with ease—perfect for sparking lifelong hobbies.

## Overview

The National Geographic Starter Rock Tumbler Kit is a durable, leak-proof rock polisher designed for kids and beginners. It includes a powerful motor, a rubber-lined barrel for quiet operation, ½ pound of rough stones featuring nine gemstone varieties, a four-stage polishing grit system, and jewelry fastenings to create custom accessories. This all-in-one STEM kit combines hands-on fun with educational insights into geology, making it an inspiring hobby starter backed by National Geographic’s quality guarantee.

## Description

Kick off an exciting new hobby with the Starter Rock Tumbler Kit from National Geographic! This kit has all the features and accessories you’ll need to transform rough rocks into extraordinary gemstones, start an awesome rock collection, and create beautiful jewelry. Contents and Features:- Reliable, long-lasting motor- Leak-proof, rubber-lined tumbler barrel- ½ pound of stones and four levels of grit- 5 Jewelry FasteningsThis high-quality beginner tumbler makes rock tumbling easy for kids and adults. Detailed instructions are easy to follow and will have you successfully tumbling in no time!The rough rocks provided (½ lb) contain nine different gemstones from around the world, and our tumbling grit is labeled by tumbling stage to make the process even easier! Choose your favorite gems and turn them into jewelry with the included necklace, key chain, ring, and two clip-on earring fastenings inside.This is a great way to inspire a love of a hobby that can last a lifetime! Plus, kids are astounded by the transformation they'll see once rocks are fully polished! It's also a fantastic STEM toy thanks to the detailed learning guide. There they'll learn how rocks are smoothed and polished over time in nature and discover fascinating facts about the gemstones in the kit!National Geographic Toys is proud to provide only the highest quality products, each backed by a complete satisfaction guarantee so that you can buy with confidence.About the National Geographic Society: With a mission to inspire people to care about the planet, the National Geographic Society is one of the world’s largest nonprofit scientific and educational organizations.

Review: It's ok
Review: Volevo qualcosa per lucidare le piccole pietre che raccolgo al mare e questo buratto lo fa ad un prezzo accessibile.

## Features

- CREATE YOUR OWN GEMSTONES - Rock tumbling is a hugely popular hobby for kids and adults! This starter rock tumbler makes it fun and easy to turn rough rocks into beautifully polished gemstones, thanks to its simple operation and durable design.
- A TUMBLER THAT'S MADE TO LAST - The durable motor allows you to tumble multiple batches of rocks. An improved, leak-proof barrel is lined with rubber for quieter operation while tumbling on the sturdy tumbler base.
- ALL-IN-ONE TUMBLING KIT - This kit has everything you need and then some! You get ½ a pound of rough rocks with nine different types of gemstones inside, five jewelry fastenings, and our four-stage rock polishing grit.
- EASY TO USE AND EDUCATIONAL - Detailed tumbler instructions lead you step-by-step through the rock tumbling process, A full-color learning guide details how rocks are naturally polished and has fascinating facts about the gemstones in the kit.
- SATISFACTION GUARANTEED – The National Geographic STEM series provides kids high-quality educational toys that are a whole lot of fun! If your experience is anything less than extraordinary, let us know so we can make it right for you.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01I56RV0C |
| Assembly Required | No |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #47,311 in Toys ( See Top 100 in Toys ) #755 in Educational Science Kits |
| Color | Original Version |
| Customer Reviews | 4.3 4.3 out of 5 stars (10,646) |
| Date First Available | 31 August 2016 |
| Educational Objective(s) | Geology, Process Understanding, Critical Thinking, Scientific Inquiry |
| Item model number | NGTUMBLER2 |
| Language | German |
| Manufacturer recommended age | 8 - 12 years |
| Material Care Instructions | See Included Manual |
| Material Type(s) | Silicone |
| Number of Game Players | 1 |
| Number of Puzzle Pieces | 30 |
| Product Dimensions | 27.9 x 13.2 x 30.48 cm; 1.9 kg |
| Radio Control Suitability | Home, Travel |
| Release date | 13 October 2017 |
| Remote Control Included? | No |

## Product Details

- **Age range (description):** 8 years and up
- **Brand:** Blue Marble
- **Item dimensions L x W x H:** 27.9 x 13.2 x 30.5 centimeters
- **Size:** 1 Count (Pack of 1)
- **Theme:** science

## Images

![NATIONAL GEOGRAPHIC Starter Rock Tumbler Kit - Durable Leak-Proof Rock Polisher for Kids - Complete Rock Tumbling Kit - Geology Hobby Science Kit, Rocks and Crystals for Kids, A Great STEM Activity - Image 1](https://m.media-amazon.com/images/I/81HyxXKFvrL.jpg)

## Questions & Answers

**Q: Can this be used to tumble glass to make sea glass?**
A: Yes! I have a spot where I find lots of shards of glass and rare colors but they just aren’t “cooked” enough. I got the tumbler to finish them. The glass I have is real sea glass not fake nor bottles I break (which I have never done and won’t because I like that I find my glass and know it has a story from whence it came!) I have found it along beaches and rivers but it just needed some extra time to be perfect but because of the color rarity I wasn’t going to toss it back!

**Q: Where can I buy more grit?**
A: Amazon (there are alternatives if you want to search for a specific one you need: coarse (60/90 grit), medium (150/220 grit), fine (500 grit), rock polish (TXP aluminum oxide) but below are two choices that will contain all you’d need, are approx the same lbs of material, and will work equally well):

https://www.amazon.com/dp/B01MRKI4W0/ref=cm_sw_r_cp_api_i_8luBDbAX0440H

https://www.amazon.com/dp/B07PYFGT44/ref=cm_sw_r_cp_api_i_SkuBDbZFZBTVW

**Q: How many pounds/ounces of rocks can you put into the barrel with grit for tumbling?**
A: The Rock Tumbler can hold 1lb (16oz) of rocks in the barrel with the grit for tumbling.Thank you for your inquiry!

**Q: How long does it take from start to finish? And can you use any rocks or only the ones that come with it**
A: Each grade of sand is a different grit. About 3 weeks and one extra week to polish. You can run any rocks even ones that you find.

## Customer Reviews

### ⭐⭐⭐⭐ Review
*by H***Y on 10 January 2026*

It's ok

### ⭐⭐⭐⭐⭐ Review
*by N***O on 20 January 2019*

Volevo qualcosa per lucidare le piccole pietre che raccolgo al mare e questo buratto lo fa ad un prezzo accessibile.

### ⭐⭐⭐⭐⭐ Review
*by M***L on 29 December 2025*

Super leuk alleen niet in het Nederlands

## Frequently Bought Together

- NATIONAL GEOGRAPHIC Starter Rock Tumbling Kit - Durable Leak-Proof Polisher for Kids Complete Geology Hobby Science Kit, Rocks and Crystals Kids, A Great STEM Activity
- NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit – 1Lb. Gemstones and Rocks for Tumbling including Unpolished Amethyst and Quartz – Rock Tumbler Supplies include Rock Tumbler Grit and Jewelry Accessories
- Blue Marble National Geographic Rock Tumbler Grit and Polish Refill Kit - Tumbling Grit Media, Polish Up to 20 lbs. of Rocks, Works with Any Rock Polisher, Rock Tumbler Supplies

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*Product available on Desertcart Kenya*
*Store origin: KE*
*Last updated: 2026-03-03*