This project can be extremely messy. You may want to lay newspaper down on the floor or table before you start.
You will need:
Shallow tub or bowl
Pour a small box of corn starch into the tub. Mix in small amounts of water. Then get your hands into the mess to get the full effect of this weird texture. The cornstarch and water mixture will harden in your hands when you squeeze it, but when you open your hands, it melts like goo.