The Annenberg Center and Game Innovation Law at the University of Southern California have produced a nifty game for exploring redistricting and gerrymandering. According to their About Page:

The Redistricting Game is designed to educate, engage, and empower citizens around the issue of political redistricting. . . . By exploring how the system works, as well as how open it is to abuse, The Redistricting Game allows players to experience the realities of one of the most important (yet least understood) aspects of our political system. The game provides a basic introduction to the redistricting system, allows players to explore the ways in which abuses can undermine the system, and provides info about reform initiatives – including a playable version of the Tanner Reform bill to demonstrate the ways that the system might be made more consistent with tenets of good governance. Beyond playing the game, the web site for The Redistricting Game provides a wealth of information about redistricting in every state as well as providing hands-on opportunities for civic engagement and political action.