Layers of the Earth with Food

Food items can be used to emphasize the three layers of the Earth. For example, the yolk, white, and shell of a hard-boiled egg are good analogies to the core, mantle, and crust, respectively, of the Earth. If fruit is available, the seeds, white, and skin of an apple can be used. A pizza, with concentric rings of different ingredients could illustrate the core, mantle, and crust. Alternatively, concentric layers of different colored clays can be used to make a model of the Earth.

Volcano World, http://volcano.und.nodak.edu/vwdocs/vwlessons/activities/p_number1.html