Introduction: Make Your Own Stress Ball (and a Lesson in Non-Newtonian Fluids)
This is a simple, easy science project for any age, and is good for PT, hand exercise, or just for fun!
Supplies
- 6 TBSP Cornstarch
- 4 1/2 TSP Water
- 1 Balloon
- Measuring Cup with a narrow spout
- Balloon Pump
- Measuring Spoons
Step 1: Back to Science Class
Non-Newtonian fluids are fluids that ignore Sir Isaac Newton's Law of Viscosity, i.e. constant viscosity independent of stress. In non-Newtonian fluids, viscosity can change when under force to either more liquid or more solid.
Ketchup, for example, becomes runnier when shaken and is thus a non-Newtonian fluid. Many salt solutions and molten polymers are non-Newtonian fluids, as are many commonly found substances such as custard, honey, toothpaste, paint, blood, melted butter, and shampoo.
Step 2: Make a Stress Ball
Take your balloon and blow it up with a pumper, then deflate it. Pour all the cornstarch in a large bowl, then pour 4 1/2 teaspoons of water on the cornstarch. You can do a little more, but don't make it too watery, or it will not work as well. Mix it up, then have some fun with it for a while!
Tip: Hold it in your hand without squeezing, and be amazed!
Pour it into your widened balloon, then tie it together. You now have the coolest stress ball ever!
Step 3: Finishing and More
If you want, color the water that you mix with the cornstarch. Use it in a clear balloon for fun results!
You are done!
Thank you for reading, and as always,
Merry Making from g3holliday!
