What is the method of how to open them? Do you need to have a separate tool for that?

The best way to open them is to take a large file & carefully cut a groove around the Geode along any depressions in the shape. Place in on a towel on a concrete floor. Be sure to put on safety glasses! Take a large chisel and place it in the groove. Strike the end of the chisel with a hammer to break the Geode open. Be careful everyone standing near has their safety gasses on as well!

Can use a sharp,big knife or if not, what do you use

Please do not even consider attempting this with a knife. That is an E.R. trip in the making. We were quite successful with a hammer and wide chisel.

Does the item include a hammer?

If you don't already have a hammer, this item is not for you.

They are real just not real impressive. You're better off to buy bigger geodes online. The kit has nothing spectacular you need. My package was full of solid rocks. Took a 5 lb sledge to get the apart. 100% waste of money.

National Geographic Break Open 10 Premium Geodes For Kids Ages

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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R$778

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Sold byAmazon BrazilDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💎 Crack open curiosity, reveal brilliance!

READY FOR ACTION - Compact, durable set designed for indoor or outdoor cracking sessions—science fun anytime, anywhere.
STEM POWERED DISCOVERY - Engage young minds with a full-color learning guide that transforms playtime into a hands-on geology lesson.
SAFETY MEETS EXCITEMENT - Complete kit includes safety goggles and display stands, ensuring a secure and stylish science experience.
UNBOX NATURES HIDDEN GEMS - Crack open 10 authentic geodes revealing dazzling crystal varieties hand-selected for maximum wow factor.
PERFECT GIFT FOR FUTURE EXPLORERS - Award-winning National Geographic kit inspires curiosity and creativity in kids aged 8-12.

The National Geographic Break Open 10 Premium Geodes kit offers kids aged 8-12 an immersive STEM experience by letting them physically break open 10 real, hand-selected natural geodes to discover colorful crystals inside. The set includes safety goggles, a magnifying glass, display stands, and a full-color educational guide, making it a safe, engaging, and award-winning science toy that fosters hands-on learning and creativity.

Specifications

ASIN	B0160JB7IS
Age Range Description	8 years and up
Best Sellers Rank	#2,144 in Toys & Games ( See Top 100 in Toys & Games ) #14 in Educational Science Kits
Brand Name	Blue Marble
Customer Reviews	4.5 out of 5 stars 32,061 Reviews
Educational Objective	STEM
Global Trade Identification Number	00851456006470
Included Components	10 Premium Quality Geodes, Safety Goggles, Magnifying Glass, Display Stand, Learning Guide
Item Dimensions	2.75 x 7.75 x 12 inches
Item Highlight	Safety Goggles, Real Crystal Geodes, Geology Science Kit, Break Your Own Geodes, STEM Activity, Birthday Gift
Item Type Name	Break Open 10 Premium Geodes
Item Weight	2.1 pounds
Manufacturer	JMW Sales, Inc.
Manufacturer Part Number	NGGEO10
Manufacturer Warranty Description	We're proud to make the highest quality products which are backed by exceptional service.
Manufacturer recommended age	8 years and up
Material Type	Crystal
Model Number	NGGEO10
Number of Items	1
Set Name	10 Geodes Kit
Size	10 Geodes
Sub Brand	National Geographic
Theme	Science
UPC	851456006470
Unit Count	1 Count

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