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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$99.33

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Description

💥 Crack open curiosity with every geode!

SAFETY MEETS FUN - Includes safety goggles so kids can crack open geodes worry-free.
EXPLORE SCIENCE HANDS ON - Engage with a full-color learning guide that makes geology captivating and accessible.
AWARD WINNING EDUCATIONAL KIT - From the Toy Association’s Toy of the Year winner, trusted for sparking creativity and curiosity.
UNLEASH HIDDEN CRYSTAL TREASURES - Break open 10 hand-selected natural geodes for a dazzling STEM adventure.
PERFECT GIFT FOR FUTURE SCIENTISTS - Ideal for kids 8-12, blending play with real scientific discovery and impressive display pieces.

National Geographic Break Open 10 Premium Geodes is a STEM-focused educational kit featuring 10 real, hand-selected geodes ranging from ping-pong to tennis ball size. Designed for kids ages 8-12, it includes safety goggles, a magnifying glass, a display stand, and a full-color learning guide to deepen understanding of geology. This award-winning kit combines hands-on fun with scientific discovery, making it a top-rated gift that inspires creativity and learning.

Specifications

ASIN	B0160JB7IS
Age Range Description	8 years and up
Best Sellers Rank	#1,452 in Toys & Games ( See Top 100 in Toys & Games ) #9 in Educational Science Kits
Brand Name	Blue Marble
Customer Reviews	4.5 out of 5 stars 31,966 Reviews
Educational Objective	STEM
Global Trade Identification Number	00851456006470
Included Components	10 Premium Quality Geodes, Safety Goggles, Magnifying Glass, Display Stand, Learning Guide
Is Assembly Required	No
Item Dimensions	2.75 x 7.75 x 12 inches
Item Type Name	Break Open 10 Premium Geodes
Item Weight	2.14 Pounds
Manufacturer	JMW Sales, Inc.
Manufacturer Maximum Age (MONTHS)	1188
Manufacturer Minimum Age (MONTHS)	96
Manufacturer Part Number	NGGEO10
Manufacturer Warranty Description	We're proud to make the highest quality products which are backed by exceptional service.
Material Type	Crystal
Model Number	NGGEO10
Set Name	10 Geodes Kit
Size	One Size
Sub Brand	National Geographic
Theme	Science
UPC	851456006470
Unit Count	1.0 Count

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