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.

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💎 Spark curiosity, grow brilliance, and own the science spotlight!

CRYSTAL GROWTH MASTERY - Grow 7 dazzling crystals in unique shapes and colors, unlocking hands-on chemistry magic.
STEM LEARNING MADE FUN - Boost scientific curiosity and patience with real-time, visible transformations.
ALL INCLUSIVE SCIENCE LAB - Complete kit with compounds, tools, and display domes—just add water and curiosity.
VIBRANT MULTI COLOR EXPERIENCE - Experiment with 6+ vivid hues to see how conditions shape crystal formation.
PERFECT GIFT FOR FUTURE INNOVATORS - Ideal for kids 10+, inspiring independent learning and scientific exploration.

The 4M Crystal Growing Experimental Kit empowers kids aged 10+ to grow seven real, colorful crystals through hands-on STEM experiments. This all-in-one kit includes mineral compounds, containers, and tools, providing a vibrant, educational chemistry experience that fosters scientific thinking and creativity at home or school.

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Product Dimensions	21.59 x 24.13 x 8.26 cm; 476.27 g
Manufacturer recommended age	10 years and up
Item model number	5557
Educational Objective(s)	STEM
Language:	English
Number of Puzzle Pieces	1
Assembly Required	No
Batteries Required?	No
Batteries Included?	No
Material Type(s)	Mineral, Plastic, Paper
Remote Control Included?	No
Color	Basic pack
ASIN	B00ITX1K4K

4M Crystal Growing Experimental Kit – STEM Science Kit for Kids Ages 10+ | Grow 7 Sparkling Crystals in Different Shapes & Colors | Educational Chemistry Lab Activity for Home or School | 00-03272

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