Cool Goo Science Project For Your Child! Simple Project and Doesn’t Cost Much!

My daughter did a science project with her class at school and I thought this was neat. I wanted to share it with everyone, so you can try this with your child. This is a simple project and you can spend time together while doing it. While doing this project you are going to be making a solid that turns into a liquid and then back into a solid. Your child is going to love this. All kids love Goo!!

What do I need?

  • newspaper✔
  • measuring cups✔
  • 1 box of dry cornstarch✔
  • large bowl or pan✔
  • food coloring (if you want)✔
  • 1 and 1/2 cups of water✔


Check out this video of how she made her goo and how it turned out.

Handy Tips for This Project

Keep an extra box of cornstarch just in case you pour too much water in the bowl. Sometimes kids get excited. We got our cornstarch from our Dollar General for $1 a box, so it wasn’t expensive at all.

You don’t have to use the food coloring but kids love to have colored GOO. My daughter chose her favorite color, blue. Her hands were definitely blue after mixing, but a shower took it right off.

I would not recommend that you pour this in your drains, just because it turns solid to liquid. I wouldn’t want you to have to call a plumber. 🙂 We had a small bowl of water to wash our hands in and then dumped it outside to be safe.

Clean up is simple. This will wipe right off of the surface you made it on and come off your hands easily.

You can store the slime from any of these recipes in a sealed container, such as a bowl or a plastic bag. The slime is good for a couple of days at room temperature or at least a week if stored in the refrigerator.

Why does this turn liquid?

Your Goo is made up of tiny, solid particles of cornstarch suspended in water. Chemists call this type of mixture acolloid.

As you found out when you experimented with your Goo, this colloid behaves strangely. When you bang on it with a spoon or quickly squeeze a handful of the Goo, it freezes in place, acting like a solid. The harder you push, the thicker the Goo becomes. But when you open your hand and let your Goo Go, it drips like a liquid. Try to stir the Goo quickly with a finger, and it will resist your movement. Stir it slowly, and it will flow around your finger easily.

Your finger is applying what a physicist would call a sideways shearing force to the water. In response, the water shears, or moves out-of-the-way. The behavior of Goo relates to itsviscosity, or resistance to flow. Water’s viscosity doesn’t change when you apply a shearing force–but the viscosity of your Goo does. Pretty Cool, huh? Have fun with your Goo!!



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