Wish

A Wish is a request from a Sim in The Sims 3. There is a wide selection that keep Sims happy as well as working towards some short and long-term goals and rewards; similar to the Wants system in The Sims 2. Wishes come from anywhere and everywhere, based on a Sims’ traits, their job, their skills, their friends or coworkers, where they are in town, or what they might be doing. Players can promise to help their Sims with a wish or throw it away.

Satisfying these basic tasks will give lifetime happiness points that can be redeemed for minor rewards and increase a Sim's overall morale with the "Fulfilled moodlet"; a minor condition that contributes to a characters' overall mood.