I would like to set up a dedicated space in my classroom as a science area. What should I include?

Do you use Science Notebooks with your students? I have used composition notebooks for years with my kindergarten students for science notebooks and have dabbled a little in using digital science notebooks. I am curious to know how you have used them and what you think is important to include in them.

I LOVE school supplies! I get excited at the beginning of each school year as much as my kindergarten students do about using new supplies.

What is your favorite teacher supply or item? Something that you use all the time that others may like to know about?