DescriptionPlace 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 = 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.)
|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.