Water-Powered Galaxy Slime Challenge
⚠️ Safety Warning
Do not eat slime. Wash hands after playing. Some children may have skin sensitivity to borax — use contact lens solution and baking soda as alternatives.
All experiments require adult supervision.
Materials You'll Need
Gather these 6 items before starting
💡 Tip: Check off items as you gather them to stay organized!
Step-by-Step Instructions
Follow these 8 steps carefully
pour one bottle of white school glue into a mixing bowl.
Add purple and blue acrylic paint and stir until the color is deep and galaxy-like.
Add generous amounts of different colored glitter — silver, blue, and purple work great.
Slowly add liquid starch, one tablespoon at a time, stirring continuously.
Keep adding starch and kneading until the slime pulls away from the bowl sides.
Knead the slime with your hands until it reaches the perfect stretchy consistency.
Make a second batch with black paint and swirl the two colors together for a galaxy effect!
Store in an airtight container when not playing.
✅ Remember: Take your time with each step and ask an adult for help if needed!
The Science Behind It 🔬
Slime is a non-Newtonian fluid, which means it does not behave like normal liquids. The glue contains a polymer called polyvinyl acetate (PVA) — long chain-like molecules. When you add liquid starch (borax solution), it creates cross-links between these polymer chains, forming a flexible network. This is why slime can flow like a liquid when you let it sit, but feels solid when you squeeze it quickly. Scientists call this viscoelastic behavior — it has properties of both liquids and solids! This concept connects to many other areas of science, including astronomy, medicine, and environmental science.