Can you attach a string to the cap or pull pin, so kids can sit out of the way and pull the string?

Absolutely! We recommend a thin sting to go around the pull pin and a light pull motion that won't break the geyser. Try it in your hands a couple of times before attaching the geyser to a bottle.

Does this only make one geyser or more than one? -- like can I keep re-using it as long as I buy new coke and new mentos?

Only one geyser. Yes, you can use it a lot of times. There is nothing to break by time, just be gentle when you putting it on bottle-you can throw mentos to coke by accident before you tighten it

Can I use carbonated soda water?

Haven't seen if it will work with anything other than soda, but it should work the same.... Give it a try.

I am thinking about ordering a few of these for an experiment with my students. Do you lose the tips when it explodes? Are the tips necessary?

The tips stay on. You can order the one with different tips its even more fun.my 8 yr old had a blast! Some tips shoot higher some have More then one stream.

Extreme Geyser Tube | Desertcart Cayman Islands

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CI$71

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Sold byAmazon Cayman IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚀 Ignite curiosity and launch epic fun with every fizzy blast!

STEM BOOSTING FUN - Ignite critical thinking and creativity with hands-on science that’s perfect for home, school, or parties.
SKY HIGH ERUPTIONS - Launch up to 30 feet of mesmerizing soda geyser action every time.
READY OUT OF THE BOX - Complete kit includes geyser tube, Mentos, and caps—just add your 2-liter soda and get the show started.
MESS FREE ENGINEERING - Double-pull pin and tight seals ensure a clean, controlled blast without soaking you.
CUSTOMIZABLE FLOW STYLES - Choose from Turbo, Triple, or Soaker caps to create your signature eruption.

The Steve Spangler Science Extreme Geyser Tube kit delivers thrilling, up-to-30-foot soda eruptions using a patented double-pull pin trigger and three distinct caps for varied eruption styles. Designed for kids and educators, it combines hands-on STEM learning with mess-minimizing engineering, making it an ideal interactive experiment for home, school, or parties.

Specifications

ASIN	B082MS25Y2
Age Range (Description)	Kid
Age Range Description	Kid
Best Sellers Rank	#402,231 in Toys & Games ( See Top 100 in Toys & Games ) #10,305 in Science Toys & Kits
Brand	Steve Spangler Science
Customer Reviews	4.7 out of 5 stars 2,994 Reviews
Educational Objective	Creative Skills, Critical Thinking, Exploratory Skills, STEM
Global Trade Identification Number	00192407535930
Included Components	Geyser Tube, roll of MENTOS chewy mints, Fountain/Fan/Runaway geyser caps
Is Assembly Required	No
Item Dimensions	25.4 x 5.1 x 6.9 Centimeters
Item Type Name	Science Kit
Item Weight	37.5 Grams
Item dimensions L x W x H	25.4 x 5.1 x 6.9 Centimeters
Manufacturer	Steve Spangler Science
Manufacturer Part Number	WGEY-105
Material	Plastic
Model Number	857155
Number of Items	1
Number of Packs	1
Size	2 x 10 x 2.7 inches
Theme	Chemistry
UPC	192407535930
Unit Count	1.0 Count

Reviews

C**E

Great family activity

Great to do with kids. A fun family activity. Fun way to teach kids about science. Steve Spangler products are the best. Easy to follow instructions.

19.04.2026

M**S

Lots of fun, but definitely do outside!

My 11-yr old and 9-yr old had a blast with these. I bought them as a stocking stuffer last Christmas, and I’ll most likely do so again. They are definitely messy, but we used them in our backyard where there was plenty of space. The boys and my father (who was helping them) did end up getting sprayed, but it wasn’t a big deal. They were just enjoying the experience!

8.06.2026

T**Y

Science experiment

Awesome for kids

26.02.2026

M**Y

So much fun

This thing is amazing! The kids love it. The only thing I don’t like is the red stopper isn’t secure so it could slip out of place before you are ready and drop the mentos.

3.05.2025

S**I

Fun experiment

Lots of fun for kids!

11.06.2026

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