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 5 Jumbo Geodes Earth Science Kit

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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€ 133.13

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Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💎 Crack open wonder, one geode at a time!

SHOW OFF YOUR TREASURES - Display your sparkling finds with 3 included stands—because your discoveries deserve the spotlight.
EXPLORE SCIENCE HANDS ON - Dive into STEM with a full-color guide that reveals the fascinating formation of geodes.
ZOOM INTO NATURES SECRETS - Use the included magnifying glass to examine every intricate crystal detail up close.
AWARD WINNING EDUCATIONAL FUN - From the Toy of the Year winner Blue Marble, trusted for sparking creativity and curiosity.
UNLEASH THE CRYSTAL HUNTER IN YOU - Break open 5 extra-large, 100% natural geodes—each as big as a tennis ball!

The National Geographic Break Open 5 Jumbo Geodes Earth Science Kit offers kids aged 8+ an immersive STEM experience with five large, natural geodes ready to crack open. Complete with a magnifying glass, display stands, and a vibrant learning guide, this award-winning kit combines hands-on discovery with educational fun, making it a perfect gift for young science enthusiasts eager to explore Earth's hidden treasures.

Specifications

ASIN	B0B69N5W93
Age Range Description	8 years and up
Best Sellers Rank	#10,632 in Toys & Games ( See Top 100 in Toys & Games ) #93 in Educational Science Kits
Brand Name	Blue Marble
Customer Reviews	4.2 out of 5 stars 1,175 Reviews
Educational Objective	STEM
Global Trade Identification Number	00810070621544
Included Components	Geodes
Item Dimensions	12.2 x 11.02 x 3.86 inches
Item Highlight	Extra-Large Natural Geodes, Safety Goggles, Real Crystal Interiors, Break Your Own Geodes, Earth Science, Birthday Gift
Item Type Name	Earth Science Kit with 5 Premium, Extra-Large Geodes with Crystals
Language	English
Manufacturer	JMW Sales, Inc.
Manufacturer Part Number	NGGEOJUM5
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	Geodes
Model Number	NGGEOJUM5
Number of Items	1
Set Name	National Geographic Break Open 5 Jumbo Geodes
Size	One Size
Sub Brand	National Geographic
Theme	Earth Science
UPC	810070621544
Unit Count	1 Count

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