How to Make Oobleck: A Fun Non-Newtonian Fluid Science Activity for Kids

What is Oobleck?

• 💡 Oobleck is a famous example of a non-Newtonian fluid, which means it can act like a liquid and a solid depending on the pressure applied.
• 🎯 This activity explores how extreme pressure can make these fluids temporarily disguise themselves as solids.

Materials Needed

• 🥣 For this experiment, you will need a rimmed sheet pan or tray, measuring cups, corn starch, and a pitcher of water.
• 🎨 For extra fun, food coloring can be added to the water before mixing.
• 🔗 Grown-ups can find the full ingredient list and instructions at tinkercast.com/weewow.

Making Oobleck: Step-by-Step

• 🥄 Step 1: Measure and pour 1 and 1/2 cups of corn starch onto the sheet pan.
• 💧 Step 2: Add 1 cup of water and mix with your hands until combined. If using food coloring, add it to the water first.
• 🧪 Step 3: Gradually add more water until the mixture tears when you quickly scrape your finger through it, but then melts back together when you remove your finger.

Exploring Oobleck's Properties

• ✋ Step 4: This is the best part! Squeeze, squish, scoop, and pinch the oobleck to experience its unique texture.
• ⚡ Notice how the difference in pressure you apply changes its state from liquid to solid and back again.
• 🌊 Try moving it slowly from hand to hand or letting it drip between your fingers.
• ⚽ You can even bunch it up into a solid ball, which will melt when you relax your grip.