I stumbled upon a fascinating material today. On a whim and based on a partial memory of toddler crafts, I mixed some cornstarch and water to entertain my daughter. But I couldn't seem to get the mixture right. One moment it was solid cement, the next it was thin as water. Did I need to add more cornstarch, or more water?
I turned to the internet for the answer and realized I had mixed up a batch of Oobleck, a non-newtonian liquid that can be poured but acts as a solid when force is applied. What an exciting discovery! The kids and I had a blast playing with this cool gooey substance, mixing up batch after batch until the box of cornstarch was empty.