Goopy Gross Experiments

It’s science night again! Today we did some goopy gross experiments. I honestly thought this program would attract mostly boys, but I am quite happy to report that I had about an even number of boys and girls participating.  The things I find to be most difficult with science programs like this is you are stuck doing a lot of measuring ahead of time, which can be a waste if you have low attendance. I feel like I spent an hour just pouring glue into little cups. Also I tend to have patrons show up late or not pay attention so getting everyone to do the same thing at the same time can be difficult.


Non-Newtonian Fluid Experiment
This goes by the name of slime or ooblek, A simple mixture of cornstarch, water, and a drop of food coloring (if you wish). This is a fun experiment because a non-newtonian fluid  does not always act like a liquid. If you apply sudden force it will act like a solid. If you have a large speaker ( I don’t) you can expose the fluid to music and it will “dance”.


GAK – Polymer Glue Experiment
This experiment is all about chemical reactions. Mixing glue and some water with borax dissolved in it will result in a chemical reaction making slime (less borax) or GAK (more borax). You can use bigger straws to blow bubbles in the GAK too.

Bouncy Balls
Using cornstarch, glue, and borax you can create a more concentrated compound that can be rolled into a ball and will bounce. I personally thought this was the weakest of the experiments though some of the kids thought it was hands down the coolest. When I do this program again I will probably modify the Gak to slime and drop the bouncy ball experiment as two experiments are sufficient.

Attendance: 12
Activity 1: Cornstarch Non-Newtonian Fluid
Activity 2: Glue & Borax “Gak”
Activity 3: Cornstarch + Glue + Borax Bouncy Balls


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