Redrawing DC on Google Maps

Here's an interesting Google Map that I came across today from Greater Greater Washington. Following the 2010 US census it was found that there were significant population differences in the city's electoral wards.

Greater Greater Washington therefore created The DC Redistricting Game. The game presents DC's wards on a Google Map. The map sidebar shows which wards are within 5% of the average population, and which wards are too small and too large. Using the map you have to switch the census tracts around between the different wards until all the wards are within the 5% average.

Once you have completed the game you even get a unique URL to your solution so that you can share your map with others.