This post may contain affiliate links. Please read the disclosure policy for more information.
Today I am giving you all you need to know on how to make oobleck for Dr. Seuss’ Birthday week. It is Dr. Seuss week at school, so every day is a new dress theme with a new Dr. Seuss activity. One of our personal favorite Dr. Seuss activities is making oobleck from the book, “Bartholomew and the Oobleck.” This is such a fun and cute story as well, so I suggest reading the book before making the oobleck for the full Dr. Seuss experience. If you don’t already have the book, you can get it here.
“Won’t look like rain. Won’t look like snow.
Won’t look like fog. That’s all we know.
We just can’t tell you any more.
We’ve never made oobleck before.”
– Bartholomew and the Oobleck
If you have never made oobleck before, you need to try it. The consistency of this stuff is just crazy. It’s a liquid, but it’s a solid all at the same time. If you apply a lot of pressure, it acts as a solid. But when applying light pressure, it acts as a liquid. You could even make a giant pool of this stuff and have the chance to “walk on water”. Just don’t stop or you’ll start to sink!!
Why does Oobleck behave the way it does?
The most generally accepted explanation for the behavior of Oobleck is offered by Cary Sneider in “Oobleck: What do Scientists Say?”. When sitting still, the granules of starch are surrounded by water. The surface tension of the water keeps it from completely flowing out of the spaces between the granules. The cushion of water provides quite a bit of lubrication and allows the granules to move freely. But, if the movement is abrupt, the water is squeezed out from between the granules and the friction between them increases rather dramatically.
Time to Learn How to Make Oobleck
You will need:
- Pitcher of Water
- Bowl or Container
- Measuring cups
- Mixing spoon
- Food coloring (optional) – Green food coloring if you are duplicating from Bartholomew and the Oobleck
How to Make Oobleck:
- Place 2 cups of cornstarch in a bowl.
- Add 1 and 1/2 cup of water and food coloring if using, and stir well.
- Add more water or cornstarch until you get a mixture that is solid when you punch it, but liquid like when you lay your hand on top.
** When disposing your oobleck, make sure to empty it in the trash. DO NOT pour the oobleck down any drain as it could clog it.
Now play with your oobleck and see what happens!!! For ideas on the fun you can have with your oobleck or to see the consistency you are looking for, check out the video below from when we made our own oobleck.
If you are looking for other fun Dr. Seuss activities for Dr. Seuss week, check out our Green Eggs and Ham post from our Carnival Cruise. There you will find great ideas for decorating and menu ideas for more than just green eggs and ham. What are some of your favorite activities for Dr. Seuss week?