The best part is it’s really easy and cheap to make and extremely easy to clean up and the kids had a blast.
To make your own Gloop mix 1 cup of corn starch with 1/2 cup of water, using your fingers. Don’t bother trying to use a mixer! If it’s still crumbly add 1 T water. Add food coloring for fun.
We had extra fun learning about primary colors and how you can make all kinds of colors out of just red, yellow and blue.
For the scientific information: gloop is actually a “hydrosol” – a solid scattered throughout a liquid. Applying pressure to it, as you do when you punch it, traps tiny drops of water between tiny bits of starch, making the surface feel solid. When the pressure lets up, the mixture becomes watery again.