A short movie explaining the Coriolis effect from the NASA education webpage
A flash movie explaining the Hadley cell and how it drives tropical climate and the vegetation pattern
Global climate animations (seasonal cycle) from the Dpt of Geography (Oregon University)
Climate change explained to kids from the EPA website and related games
An extensive list of Global Warming games can be accessed on this wikipedia webpage. A few examples:
LogiCity is an interactive Flash-based virtual-reality based computer game, produced by Logicom
The National Energy Foundation, an English charity. The game is set in a 3D virtual city
Clim-City: strategy game in which you manage a town (in french).