Fluffy Slime, science experiment for children

Creating fluffy slime is a fun and educational science experiment that engages children with hands-on learning about chemistry and the properties of materials.

Here's how to make fluffy slime step-by-step:

Materials:

1. White school glue (PVA glue)
2. Shaving cream (foam, not gel)
3. Baking soda
4. Contact lens solution (containing boric acid and sodium borate)
5. Food coloring (optional)
6. Mixing bowl
7. Mixing spoon or spatula

Procedure:

• Prepare the Glue Mixture:
  • Pour 1/2 cup of white school glue into a mixing bowl.
  • If you want to add color, mix in a few drops of food coloring at this stage. Stir until the color is evenly distributed.
• Add Shaving Cream:
  • Add 1 cup of shaving cream to the glue mixture. The shaving cream gives the slime its fluffy texture.
  • Stir the mixture well until it’s fully combined and fluffy.
• Add Baking Soda:
  • Add 1/2 teaspoon of baking soda to the mixture. Baking soda helps firm up the slime.
  • Mix well until the baking soda is fully incorporated.
• Add Contact Lens Solution:
  • Add 1 tablespoon of contact lens solution to the mixture. The boric acid in the contact lens solution reacts with the glue to create the slime.
  • Stir the mixture thoroughly. It will start to come together and become less sticky. If the slime is still too sticky, add a few more drops of contact lens solution until you reach the desired consistency.

• Knead the Slime:
  • Once the slime starts to form a ball, remove it from the bowl and knead it with your hands. Kneading helps bring the slime to the perfect consistency.
  • If the slime is still too sticky, add a small amount of contact lens solution and continue kneading until it's stretchy and fluffy but not sticky.
• The fluffy slime is now ready to play with! Stretch, squish and enjoy the fluffy texture.

Explanation:

Fluffy slime is a non-Newtonian fluid, meaning it doesn't behave like a typical liquid. The glue contains polyvinyl acetate, a polymer, which creates long chains of molecules. When the contact lens solution (which contains boric acid) is added, it cross-links the polymer chains in the glue, turning it into a stretchy, fluffy substance.

Tips:

• Storage: Store the slime in an airtight container when not in use to keep it from drying out.
• Experiment: Try making multiple batches with different amounts of shaving cream to see how it affects the texture and fluffiness.
• Clean-Up: Clean up any slime spills promptly, as it can be difficult to remove once it dries.

Discussion Points:

• Polymers and Cross-Linking: Explain how the glue's polymers are linked together by the boric acid in the contact lens solution, transforming the liquid glue into a stretchy slime.
• Non-Newtonian Fluids: Discuss how fluffy slime behaves differently from regular liquids and solids, making it a non-Newtonian fluid.
• Sensory Exploration: Encourage children to describe the texture, stretchiness and feel of the slime, enhancing their sensory and descriptive skills.

Creating fluffy slime is a fantastic way for children to explore chemistry concepts while having fun with a tactile and engaging activity.

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