Models of Earth's Interior

Each year when I teach about the layers of the Earth's interior, I give the students a project.  They can create a model or a poster showing the layers of the Earth.  Two years ago and this year I taught brothers.  The older of the two wowed me with his three dimensional project and then his brother made one that I also loved.

This was the first brother's model

This is another side of the hanging model

This was the younger brother's model