At this point, the depth of the foundation is a key to whether the house will sink into the loose surface when the ground begins to shake. These hands-on exhibits allow visitors to quickly understand why houses that aren't built deep enough may collapse.
這時房子地樁打得深不深，房子會不會一經振動就「浮」在地面水鬆動的表層，成了關鍵；透過動手實驗，遊客立刻了解地基不夠深的房子很容易倒塌。