These applets include a wide range of user interface elements that allow students to interact with the Physlets demonstrations. For example, objects in the simulation can be dragged, with positions, potentials, or other information displayed.
Example Physlet applications can be copied and modified fairly easily. Instructions for doing this, and writing new scripts to interact with the applets, are available in the book PHYSLETS: Teaching Physics with Interactive Curricular Material by the authors. A companion web site to this book,
available at http://webphysics.davidson.edu/physletprob/Default.htm, provides a wide range of example problems.
There are many ready-to-use physlets on the webphysics websites that require little or no preparation.