GUESS WHO LIVES NEXT DOOR?
This site should be bookmarked by everyone with a family. It identifies all registered sex offenders in your neighborhood, their work sites, and it updates you on recent moves by these creeps.
The first thing you see is a map with color coded dots, which indicate where they're located in your area. Click on the dot and a picture of the person appears with all relevant information. Using the tabs at the top gives you a list of names and addresses corresponding to the dots.
Check on the area where family and friends live, too. How's the area where your grandkids live? Take a look. You will be surprised.
UPDATE: Click on a school building and all creeps in the area will be listed with pictures.