Oobleck without Cornstarch
If you want to make oobleck, you’ll need water and cornstarch. Cornstarch is a powdery substance that doesn’t dissolve in liquid easily. Add the liquid to the cornstarch to form liquid clumps of cornstarch floating in liquid. Those liquid clumps are what you’re looking for when making oobleck!
Add the same amount of water as corn starch, then mix it together until it starts to gel into a slime/pudding-like consistency. That’s your Oobleck! If you want the oobleck recipe with corn starch.