There is a lot of slime in nature and so many animals that use slime in different ways. One of my favorite activities to do with students when learning about these animals is to make Oobleck! It is an easy, fun craft that gets kids immersed into the experience of using slime in their own way. It gives them a hands-on example of how this sticky substance can be useful in nature.
Learn more here: https://sawgrassnaturecenter.org/2021/02/16/slime/