Pumpkin Oobleck

At first the kiddos called it BlueBlack, then we practiced OOOOooobleck.  But when they saw it they decided it must be orangebleck, because it certainly wasn’t blue!


My husband gets emails from South Dakota Game Fish and Parks regularly and usually I don’t pay attention to them. But when he forwarded this recipe for Pumpkin Oobleck to me I got really excited. You know I hate to waste anything and I was thinking I used up those pumpkins nearly to the bare bones. Now I have one more use for a discarded part of the pumpkin. The insides! And not only is it thrifty, it’s super fun for the kiddos. They had a blast doing this for over an hour, and clean up for a huge mess was surprisingly easy.  It rinsed right off the kiddos with barely any effortand slip right off the table as kind of a dry mess instead of staying sticky.  So cool.  I hope you get to try it, I know we will be doing it again.


You’ll need:
•The insides of a pumpkin, with the seeds removed

Make it:
Separate the seeds from the inside of the pumpkin. Place the pumpkin goo inside a blender with some water and blend together. Keep adding water until you get a smooth, thin consistency.

Add a 1/2 cup of cornstarch to an empty bowl. Take 1/2 cup of your pumpkin goo and add it to the cornstarch until you have the consistency you like. Usually a 1:1 ratio of cornstarch to water (or in this case pumpkin goo) works well. Just play with amounts until you are happy.

You can also give your child free reign over mixing the two ingredients together. Most children will eventually add all that you give them together, so you might want the amounts to be similar. If you have too much water or pumpkin goo, you’ll end up dissolving all of your cornstarch.

Play with It!

The result is oobleck – a gooey substance that will pour like a liquid, but act like a solid when squeezed or pushed. Try moving your fingers through the liquid slowly, then more quickly. Drop a handful onto the table. Pressure or force causes the oobleck to act like a solid. Get enough oobleck, and you can even walk across it! But stop moving, and you sink like a stone.

My Pinterventures

Have you ever made Oobleck?

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