We went to a class and learned about salt ponds and how marine life has to be able to adapt to high changes in salinity and water temperature. 
We collected water samples and took readings of salinity and temperature.
using the cool tool for salinity.
The next day we went with Grandma to Brooker Creek and attended a class on Invasive Plants. We learned about the importance of planting natives and avoiding exotics.
At the extension office in the evening I loved the display of invasive plants and could name them all.
I attended a class for club treasurers for 4-H. I had to talk about my treasurers book and how I keep records. I think I did pretty well.