This classic slime recipe combines glue and Borax solution to create a stretchy, gooey substance. The process demonstrates how polymers can cross-link to form new materials, making it a fun way to explore chemistry through hands-on play.

- In one bowl, mix about ¼ of a bottle of glue with ¼ cup of water. - Add food coloring if you want colored slime. - Stir in ¼ cup of liquid Borax solution. - Slime will begin to form immediately. Stir, then knead with your hands until it becomes less sticky. - Store in a plastic bag in the refrigerator to keep it from growing mold.

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• Add glitter for sparkly slime.
• Mix in glow-in-the-dark paint or thermochromic pigment for color-changing slime.
• Use tonic water for slime that glows under black light.
• Adjust the amount of borax to change the slime’s texture and stretchiness.

- Do not eat slime. - Always wash hands after making or playing with slime. - Supervise children closely when handling Borax solution. - Store slime properly to prevent mold growth.

• What role does Borax play in turning liquid glue into slime? (Borax crosslinks the glue’s polymers.)
• Why does kneading change the slime’s texture? (It allows the crosslinking reaction to progress evenly throughout the mixture.)
• How is slime an example of a polymer? (It consists of long chains of molecules linked together, similar to plastics and rubbers.)