Place these hard crystals in water and they expand about 300 times, producing gel-like spheres. Students love to feel the slippery, spherical gel! The Regular size starts with a diameter of about 2 mm and ends with a diameter of about 14 mm. Ask students to determine the change in volume, using V = 4/3 πr3
. Great for starting seeds and growing plants so that the roots can be seen! Can be tinted using food coloring. The polymer is similar to our super-absorbent, polyacrylamide polymer (GB-5B and GB-3) and can be dried and reused. Small (~1 cm expanded), Regular (~1.4 cm expanded) or Jumbo (~3.3 cm expanded)! (Each package contains 50 grams.)
Download the MSDS of this product.
Read more on our Blog - Using Growing Spheres for 3D Modeling
Read more on our Blog - Growing Spheres Help Students Absorb Scientific Principles
Read more on our Blog - Ghost Eyeballs | Growing Spheres
|Item # ||Style ||Size ||Grams ||# of Spheres |
|GB-702 ||Small ||~1 cm (0.4") ||50 ||~3000 |
|GB-710 ||Regular ||~1.4 cm (0.55") ||50 ||~2500 |
|GB-730 ||Jumbo ||~3.3 cm (1.3") ||50 ||~870 |
Adult supervision required. This is not a toy. Do not ingest.
Write a review
Awesome But Needs More Details
Feb 14, 2018 | By Sarah of Columbia, SC United States
Jumbo Growing Spheres
Jan 4, 2016 | By Kami of Salt Lake City , UT United States
Oct 27, 2015 | By Leisa Kolberg of Omaha, NE United States
great, but becareful of what you expect
Dec 19, 2014 | By kareng of Oakland, CA United States
Mar 8, 2014 | By Craig Hansen of Fort Collins, CO United States
Owner Response:We're sorry for your disappointment, Craig. I think our Gigantic Spheres are more in line with what you are envisioning should grow to the size of a tennis ball. They grow to approximately 5 cm in diameter. As listed in the description, the Jumbo Spheres expand to approximately 3.3 cm, and the Regular Spheres expand to approximately 1.4 cm.
Sep 15, 2013 | By Carol Roach of Aiken, SC United States
Jul 30, 2013 | By Janie Smith of Columbia, SC United States
May 23, 2013 | By Beverly Pape of Merriam, KS United States
Dangerous for preschoolers!
Nov 25, 2012 | By Cynthia of San Diego, CA United States
Owner Response:Thank you for bringing this to our attention. Though none of our materials are intended for use with children younger than school age, we have included warning labels on this particular product cautioning the buyer of the choking hazards associated with it.
High School Religion Teacher
Sep 16, 2012 | By Anne Andersson of Riverdale, NY United States
Excellent to see seed growth
May 29, 2012 | By Justin Monaco of Hamilton, ON Canada
Good Cross Curriculum Item
May 22, 2012 | By Margaret Carter of Wapato, WA United States
May 22, 2012 | By Maryjane Utley of Westerly, RI United States
Great to Start Demonstrations!!!
May 22, 2012 | By Laura Slocum of Indianapolis, IN United States
May 16, 2012 | By Susan Robertson of Solon, OH United States
May 16, 2012 | By prin furst of moravia, NY United States
May 16, 2012 | By Kim Weber of Elizabethtown, KY United States
Great to start Seeds
May 16, 2012 | By C. Davis of Katy, TX United States
Grow Spheres are Great
May 16, 2012 | By Shari Litch Gray of Hampstead, NH United States
May 16, 2012 | By June Stevens of Nashville, TN United States
May 16, 2012 | By Stacy of Baker, FL United States
Students love them
May 16, 2012 | By Brittany Arnold of Lake Helen, FL United States
May 16, 2012 | By Dr Marco Miranda of Switzerland
This product will support your students' understanding of the Next Generation Science Standards (NGSS)*, as shown in the table below.
Suggested Science Idea(s)
Students can use Water Gel Spheres to plan and conduct investigations to provide evidence that vibrating materials make sound and that sound can make materials vibrate.
Students can use Water Gel Spheres to plan and conduct an investigation to determine the effect of placing objects made with different materials in the path of a beam of light.
Students can analyze data obtained from testing different materials to determine which materials have the properties that are best suited for an intended purpose.
Students can use Water Gel Spheres to make observations and measurements to identify materials based on their properties.
Students can use Water Gel Spheres in an investigation to develop a model to describe composition of simple and extended structures.
Students can analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred.
Students can use Water Gel Spheres in an investigation to develop and use a model to describe that waves are reflected, absorbed, or transmitted through various materials.
DCI-MS/ETS1.B: Developing Possible Solutions.
A solution needs to be tested, and then modified based on the test results in order to improve it.
Students can use Water Gel Spheres in an investigation to construct and revise an explanation for the outcome of a simple chemical reaction based on the outermost electron states of atoms, trends in the Periodic Table, and knowledge of the patterns of chemical properties.
Students will observe and communicate scientific information about why the molecular-level structure is important in the functioning of a material.
Students can conduct simple tests using Water Gel Spheres to understand the rate at which the polymers absorb or evaporate water. Information gathered can be used as evidence to support or refute student ideas about hydrophilic (water loving) materials.
Students can conduct simple tests using Water Gel Spheres as magnifying lenses. Students can also experiment with sound waves and their effects on the hydrophilic polymer.
* NGSS is a registered trademark of Achieve. Neither Achieve nor the lead states and partners that developed the Next Generation Science Standards were involved in the production of, and do not endorse, this product.