Hands on project for creating a visual exploration of the layers of the earth! There are very few supplies needed for this assignment, and it is a relatively quick assignment. In my experience of using this project in the classroom you might want to precut the circles or give the students a template of the sizes (so there inner core isn't bigger than their mantle). And if you don't want to make a mobile, it is also fun to fold them up and lay the circles inside each other. Have fun!