Try one of the four easy-to-build, inexpensive, hands-on activities that demonstrate various aspects of earthquake science and plate tectonics. The "cookie subduction" activity uses a cream-filled cookie to demonstrate subduction and accretion. The "highway seismograph" lets you model the workings of a real seismograph as you record a bumpy car ride. "Seismic Slinky" demonstrates different patterns of seismic waves that spread an earthquake's destructive energy. "Liquefaction" demonstrates how some soils, such as landfill, lose their solidity in an earthquake.