How to Make Cornstarch Slime

On Sid the Science Kid, Emmy watched Sid make green slime, and so she wanted to try to make some at home!

Here’s how you make it:

In a medium sized bowl, put a cup of cornstarch. In a measuring cup, add a couple drops of green food coloring to one cup of water and stir. Add about 3/4 cup of water to the cornstarch and stir. Have your kids mix it up with their fingers! Depending on the consistency that you want, add more water or more cornstarch. Pour onto a cookie sheet with edges to contain the mess. You might be surprised how much YOU like playing with green slime! (I thought it was so cool to touch!)

If you get the slime to the right consistency, it acts like a solid when you are playing with it, and then melts to a liquid when you let it stand. Emmy and I played with adding water and adding cornstarch to see what would happen. In this video of Emmy, the slime is a little more liquid-y.

(P.S. If you are reading this post in your email, please click over to Lemon Drop Pie to watch the video of Emmy playing with slime!)

Since the slime is just cornstarch and water, clean up is so easy–trust me! As a preschool teacher who has had to clean up play dough tables every day before snack time, I can tell you that play dough is much harder to clean up. Plus, cornstarch is much safer for preschoolers, unlike the recipe for slime that uses glue and Borax.

Have fun! (And make some even if you don’t have kids!)

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