Popular, educational PC game fun to play on Facebook, too.
Social game combines a building sim with hidden objects.
City-building sim has players incorporate own genealogy.
Bake and sell goodies in online sim game.
Facebook sim promotes friending strangers and paying.
Free virtual zoo sim is fun, deep; only allows teens.
Facebook game takes FarmVille concept to a new level.
Light fair-building simulation is fun and free on Facebook.