This interactive contains four animated slides that introduce the greenhouse effect. An additional animation offers to 'explore more'.
An interactive simulation of Earth's seasonal dynamics that includes the axial tilt and other aspects of Earth's annual cycle.
This is part of a larger lab from the University of Nebraska at Lincoln: http://astro.unl.edu/naap/motion1/motion1.html
This is an animated interactive simulation that illustrates differential solar heating on a surface in full sunlight versus in the shade.