A disaster simulation game from the UN and ISDR or the International Strategy for Disaster Reduction. Different games that allow students to understand the mechanisms of different disasters such as Tsunamis and Earthquakes. Afterwards students can then design different types of strategies through an interactive game to reduce damages and deaths which are associated from the disaster. This is a great website to stimulate motivation from students to become proactive with the game, offering a sense of empowerment, especially if the students are able to do well and score high.
Here is another source I found interesting that offers insight on the anatomy of Tsunamis.