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.

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🌟 Ignite Curiosity, Launch Learning!

MESS FREE MAGIC - Innovative double-pull pin and tight seals ensure safe, controlled eruptions—perfect for classrooms and parties alike.
READY OUT OF THE BOX - No assembly or batteries needed—just add soda and Mentos to ignite instant scientific fun.
INSPIRE FUTURE INNOVATORS - Designed by Steve Spangler Science to spark curiosity and confidence in young scientists and engineers.
BLAST OFF WITH 3 SPRAY STYLES - Choose from three distinct spray caps to customize your soda geyser eruption and wow your friends every time.
STEM LEARNING MEETS EXCITEMENT - Engage critical thinking and creativity with a thrilling hands-on chemistry experiment that makes science unforgettable.

The Steve Spangler Science Extreme Geyser Tube kit includes a tube, candy, and three unique spray caps to create spectacular soda and Mentos eruptions. Designed for hands-on STEM education, it features secure double-pull pins and tight seals for safe, mess-free experiments. Perfect for classrooms, parties, or home use, this ready-to-use kit inspires creativity, critical thinking, and a passion for science in kids.

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Product Dimensions	25.4 x 5.08 x 6.86 cm; 37.5 g
Item model number	857155
Educational Objective(s)	Creative Skills, Critical Thinking, STEM
Assembly Required	No
Batteries Required?	No
Batteries Included?	No
ASIN	B082MS25Y2

Steve Spangler Science Extreme Geyser Tube - Science Kit for Kids - Mentos & Soda Lab Experiment - Includes Tube, Candy, & Unique Spray Caps - Chemistry Magic - Classroom STEM Project

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