Fun

"Fun means something different to everyone. Some Sims may prefer reading while others like watching TV. Most Sims will enjoy playing a game of pinball or darts with other Sims."

- The Sims 2

Fun is a motive in The Sims series. In other Sims games, the fun meter decays until it is empty as in other motives. Sims, like real people, like to cut loose from the daily grind and enjoy themselves once in a while. Different Sims can have different ideas about what is more fun; for example, a Sim with a playful personality might enjoy watching television or playing computer and arcade games, but a serious Sim would probably rather spend time reading or sitting down to a quiet game of chess. In addition, things like relaxing in bed or taking a bath will reduce stress, although such activities do not contribute to fun level beyond the half level. Interactions related to fun may not stop, even when it's filled. Also, they may even perform such activities when they're fun is already full.

In The Sims 3, if the fun bar slowly rises to the maximum, it will give the "entertained" moodlet, and if it continues to rise, will eventually give the "having a blast" moodlet. The fun meter stops decaying once it is half full and will only decay once the Sim does stressful actions such as work. If the fun meter goes down, it will give the "strained" moodlet, and if not raised will give the "stressed out" moodlet. Also with World Adventures, Sims can purchase the Carefree lifetime reward, Carefree for 20,000 lifetime points, which increases fun gain by 25%.

In The Sims 4, a Sim with low fun need will receive a +1 "Needs Amusement" tense moodlet, which will evolve into a +3 "Desperate for Fun" tense moodlet. The Carefree satisfaction reward trait protects the Sim from all tense moodlets, effectively sparing the Sim from low fun need's punishments.

Fun activities
In addition, the "Sugar Rush" moodlet will temporarily halt the decay of the fun motive, and is gained by:
 * Playing basketball or soccer
 * Feeding or watching the fish in the aquarium
 * Playing with babies
 * Diving and swimming
 * Viewing a fountain or lava lamp
 * Playing chess, checkers, Mahjong, or pool
 * Playing with Pets
 * Playing video games on the computer or on TV
 * Blowing bubbles of the flavor Cotton candy with the bubble bar
 * Drinking nectar
 * Drinking juice from a non-professional bar
 * Using an oxygen bar
 * Playing carnival games
 * Going fishing
 * Practicing archery
 * Log rolling and axe throwing