I hiked where some special rocks were. It is called limestone and there are seashell and coral fossils in it. 
I learned about a tree called Poisonwood and it is stronger than Poison Ivy or Poison Oak. If you stand under it when it is raining, you will get poison on you! I forgot this and picked up some leaves to touch and I did not know if they were poisonwood leaves or not. I got very worried. 
Later on, my hands started to itch but it turned out to just be eczema. I have eczema but it’s not poisonous or contagious. No one can get it from me. It’s how my body is.