Dancing Ooblek




Introduction
Gak/Oobleck/Slime is not just a fun activity; it can be the foundation of some sophisticated learning about solids, liquids, gases, and things that appear to have the characteristics of one or more of these states of matter.


Gakology and Superheroes





How to Make a Super Bouncy Ball

, eHow Contributor
updated February 04, 2011


Super Balls are known for their bouncing ability.

Those with fond memories of the Super Ball -- the little ball that bounced remarkably high -- can recapture that little childhood joy by making a similar ball at
home
. Making a super bouncy ball is easy with common household materials available at the grocery store -- you may even already have them at home.

Difficulty:Moderately Easy

Instructions



Things You'll Need

  • 2 small bowls
  • Measuring spoons
  • Borax
  • Food coloring (optional)
  • School glue (Elmer's or other clear glue)
  • Timer that measures seconds (your microwave timer would work great)
  • Cornstarch
  • Spoon
    • 1Dissolve 1/2 tsp. borax in 2 tbsp. warm water. If you want a colored ball, add a few drops of food coloring.
    • 2Add 1/2 tsp. of the borax mixture and 1 tbsp. cornstarch to 1 tbsp. glue in the other bowl. Set the timer for 15 seconds. Do not mix until the timer goes off.
    • 3Stir the mixture until combined and then start rolling the mixture in your hands until it becomes solid and forms a ball.
    • 4Bounce and enjoy. Store the ball in a sealed container when not using it.


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Tips & Warnings


Keep the two bowls separate until you are ready to combine the ingredients.

Although the ingredients are mostly nontoxic, do not eat them.

Wash your hands and all tools after making the ball.

Supervise children while doing this project.

Keep the small ball away from young children, it may pose a choking hazard.



Read more: How to Make a Super Bouncy Ball | eHow.com http://www.ehow.com/how_4869961_make-super-bouncy-ball.html#ixzz1WRUALUa9










We didn't just have fun; we made a polymer:
http://www.stevespanglerscience.com/experiment/00000039

Here's a good recipe:
r_flubber.gif

http://www.makingfriends.com/r_flubber.htm


Gak is a non-Newtonian fluid. Here is the power point we used in class to explain these concepts:



Here is a link to a video of people walking on a non-Newtonian fluid (cornstarch and water)
http://www.youtube.com/watch?v=f2XQ97XHjVw