"The Sims 2: FreeTime is the seventh expansion pack in the The Sims 2 video game series.
A flyer included in The Sims 2: Bon Voyage expansion pack and The Sims 2 Teen Style Stuff announced this expansion and read: "Now your Sims can enjoy hobbies! Your Sims will have fun taking up a variety of creative, intellectual, or active leisure-time pursuits. They can even meet Sims that share their interests and expand their social relationships. Develop your Sims' skills while they pursue their true pastime passions. Will your Sims stumble reaching for new goals or find a new sense of fulfillment?"
With this expansion, Sims can pursue employment in five new careers including dance, entertainment, intelligence, oceanography and architecture.
The ten hobbies included in the expansion pack are fitness, cooking, music/dance, sports, nature, science, films/literature, gaming, tinkering, and arts/crafts. Every Sim is created with a predetermined "preferred" hobby which cannot be modified by the player. While the bar is filled, the Sim is "in the zone", shown graphically as a white glow around the Sim; causing their needs to decay more slowly than usual, as to allow extra time on that hobby."
Source: Wikipedia, "The_Sims_2:_FreeTime," available under the CC-BY-SA License.