Naked Eggs-periment
Day One-Hour One
There are loads of tutorials about how to conduct this experiment around the internet, but this one explains the scientific component in good detail.
Before filling the mason jar with vinegar, we...
~felt and described the egg (hard, rounded, oval, brown)
~made a hypothesis as to what would happen when we added vinegar ("Float!" "Sink!" "Break Open!")
After adding the vinegar, we started observation that continued throughout the day.
Immediately, bubbles started forming on the egg, which is the reaction of acid and calcium carbonate to produce CO2.
Day One-Midday
By midday, we had noted that not only was our egg getting larger-looking, it was also shedding it's brown tan! The vinegar had eroded it's pigment!
Day Three
After three days in vinegar, the egg made significant changes!
And all three hypothesis were accurate. There was a point when it floated (Day One), sank (Day Three) and broke open (with the help of the eager little sister!)
It also increased in size and became astonishingly rubbery!
We did have a chance to bounce it before it exploded!
Comparisons
EXPAND ON SCIENCE BASICS
Teach the Scientific Method. Even wee ones can grasp concepts used in the Scientific Method, especially if you discuss the process of an experiment every time you're working on science.
Pose question/problem
Form hypothesis/educated guess
Develop experiment w controls & variables
Observe
Analysis & Conclusion