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October 21, 2015 by Jenae - Leave a Comment
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Pumpkin Oobleck

Pumpkin Oobleck



 

We put a fall spin on our classic Oobleck experiment for this fun sensory experience! Little Brother enjoyed the texture of our Pumpkin Oobleck, but Little Sister wouldn’t even get close to it!

 

If you are not familiar with “oobleck” that isn’t actually its real name (the name was inspired by the sticky substance in Dr. Seuss’ book Bartholomew and the Oobleck). The combination of cornstarch and water is known as a Non-Newtonian fluid because it does not have properties of either a solid or a liquid…it behaves as both! Cornstarch is made up of long chains of atoms. When you move them slowly past one another, they flow like a liquid because they can slide easily past each other. When you squeeze, roll, or agitate them, the “atom chains” will get entangled and form a solid! Pretty cool, huh?

 

Here’s what you’ll need:

A pumpkin

1 cup of cornstarch

1/2 cup of water

Hand-mixer (optional, but makes it much easier)

 

Pumpkin Oobleck

1. Mix 1 cup of cornstarch and 1/2 cup of water. This is the classic “Oobleck” recipe.

 

 

Pumpkin Oobleck

2. Cut open the top of your pumpkin.

 

Pumpkin Oobleck

Gotta love pumpkin innards!

 

Pumpkin Oobleck

3. Use your hand mixer to loosen up the insides of the pumpkin.

 

Pumpkin Oobleck

4. Pour the oobleck into the pumpkin.

 

Pumpkin Oobleck

5. Mix together for a few seconds using your hand mixer.

 

Pumpkin Oobleck

The texture is especially unique with the pumpkin seeds inside the oobleck!

 

Pumpkin Oobleck

Love this face! He thought it was grossly cool and Little Sister kept a safe distance.

 

Pumpkin Oobleck

 

 

Pumpkin Oobleck

“Maybe I’ll just put one finger in. Wait. Nope…not doing it.”

 

Pumpkin Oobleck

 

 

Pumpkin Oobleck

Put the lid on it and save it for later. The cornstarch will dry out a bit, but you can just add more water.

 

 

Check out more fun pumpkin-inspired activities here!

 

 

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