These Jelly Marbles help kids learn about hydrogels and how they're used to help the environment. They can also be used to teach lessons in color and light. What starts out as a 3mm pebble, quickly becomes an approximately 20mm ball of jelly! 50-gram jar of Jelly Marbles (over 700 individual Jelly Marbles) can be used over and over again.
- ABSORB 300X THEIR WEIGHT: Steve Spangler's Jelly Marbles are super absorbent giant growing polymer beads that absorb 300 times their weight in water!
- REUSABLE SCIENCE TOY FOR KIDS: Steve Spangler's Jelly Marbles can be used over and over again! Try drying them out to see how quickly evaporation can take over, and then drop them in water and watch them grow again and again.
- HALLOWEEN FUN: Unsuspecting Trick-or-Treaters will be surprised when they place their hands in a bowl of ooey, gooey "eyeballs"! Perfect for any Halloween party.
- INCLUDES: 50-gram jar of Jelly Marbles (over 700 individual Jelly Marbles!), True Colors Color Mixing Tablets, and an Activity guide.