Prodigy
The 'Crack Shack or Mansion' website will test you on your real estate savvy. You see, in Vancouver, Canada, real estate value assessments aren't easy. In desirable neighborhoods, housing prices come at a high premium, although with the drug trade being well hidden, some of these homes have become certified 'crack shacks,' which therefore reduce their value (duh?).

At the 'Crack Shack or Mansion' site, there is a picture game where you must guess whether the pictured houses fall into the 'mansion' or 'crack shack' category, which is a fun way to test your real estate savvy!