Look how fun and easy can be 100% fun at home.
You want to say Slime, but not it is Oobleck.
What do you need:
-food color (can be without)
How to do:
just mix it all together
2 portion of Starch + 1 portion of water
mb you will need add more water till the Oobleck "well done".
What to teach:
When you slap the Oobleck, you will feel than this liquid is so strong, it is happen because you force the long starch molecules closer together. The Oobleck flows again, When the pressure is released.
(an example of a suspension)