Download the zip and run playItSafe.py to make the Play It Safe map from scratch.
This will generate the play it safe CSV file, just drag this file onto http://map.terria.io/
See which parks are safe to play at, the parks with the lowest safety scores are the best! You can also see how the level of CCVT cameras, Grafiti and Schools in the area. THeese are the Play It Safe safety factors.