Can these be displayed for years or are they disposable in a few days?

For years. YEARS. It's been at least five years since I've last made these and their all missing their broken display cases but they just sit on my shelf. They are all perfectly fine, aside from maybe being pretty dusty.

According to the packaging warnings, yes, it is. However, the most basic care and attention can avoid any issues. Example, do not consume the chemicals with clear labels of their toxicity. You basically grow the crystal then put it in a display case. It is not for handling. I am not the most careful individual in the world and I did not perish using the product. My cat was smart enough not to consume the product as well. However, if someone were to get ill from the product, I think that would be considered natural selection more than anything.

About how long does a experiment take?

It takes about 45 min to set up including boiling some water and letting it cool. The directions are very good. Once set-up is complete it could take up to 7-days for crystals to grow but I saw results overnight. Hope this helps.

How big does this get and do you only get to grow 1 crystal?

One crystal cluster, about 2-3/4" wide (3" dia. container), about 2" high. Ours is a white crystal. My 8 year old enjoys shining a flashlight under and behind it to see the light effects.

4m Crystal Growing Experimental Kit | Desertcart Cook Islands

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Description

✨ Grow brilliance at your fingertips with 7 dazzling crystal experiments! 🔮

SHOWCASE YOUR SCIENCE - Each crystal grows in its own sleek display dome—perfect for your desk or shelf.
OFFICE HOME FRIENDLY - Compact kit ideal for busy professionals and curious kids alike—ignite creativity anywhere.
STEM LEARNING MEETS FUN - Engage with hands-on chemistry and geology principles designed for ages 10+.
PRECISION INSTRUCTIONS FOR SUCCESS - Step-by-step guidance ensures stunning crystal results every time.
MASTER 7 CRYSTAL GROWTH EXPERIMENTS - Explore diverse crystal formations with 7 distinct experiments included.

The 4M 7 Crystal Growing Science Kit offers a complete STEM experience with materials and instructions to grow seven different crystal types. Designed for ages 10 and up, it combines chemistry and geology principles in a fun, educational format. Crystals develop over 4-7 days inside included display cases, making it a perfect gift for young science enthusiasts or professionals seeking a creative desk project.

Specifications

ASIN	B00ITX1K4K
Age Range Description	Kid
Best Sellers Rank	#35,643 in Toys & Games ( See Top 100 in Toys & Games ) #334 in Educational Science Kits
Brand Name	4M
Customer Reviews	4.4 4.4 out of 5 stars (16,177)
Educational Objective	STEM
Global Trade Identification Number	00085761196612
Included Components	all parts to perform the science project, detailed instructions
Item Dimensions	8.5 x 9.5 x 3.25 inches
Item Part Number	5557
Item Type Name	science kit
Item Weight	1.1 pounds
Manufacturer	Toysmith
Manufacturer Maximum Age (MONTHS)	180
Manufacturer Minimum Age (MONTHS)	120
Manufacturer Part Number	5557
Manufacturer Warranty Description	30 day warranty against manufacturer defects
Material Type	Crystal
Model Number	5557
Number of Items	1
Set Name	Crystal Growing Experimental Kit
Size	Growing
Theme	Chemistry, Geology
UPC	085761196612
Unit Count	1 Count

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