Plate Tectonic Model Demonstrating the Role of Convection Currents in Plate Motion

This plate tectonic model is an excellent demonstration for the classroom. Students can "view" convection currents caused by unequal heating
of the mantle (oil) and watch the "plates" move!
Models in science are necessary because many natural processes like plate motion are very slow and on a large scale, so this can help students understand the conditions and the process on a basic level.