The Sims 4: Growing Together

The Sims 4 base game is free to play and constantly updating with bug fixes, tweaks, and new content. For example, Infants were added in March 2023 as a life stage between Newborns and Toddlers.

Infants, while not as helpless as Newborns, are significantly less independent than Toddlers. The Sims 4: Growing Together DLC makes this even more so by including features like growth Milestones and Quirks. Quirks, in particular, really make Infants feel unique and alive by affecting their overall behavior.

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What are Infant Quirks?

Quirks are a Growing Together exclusive that adds more gameplay to Infants. Quirks are behaviors and preferences randomly assigned to infants as they grow and experience new things.

Quirks affect sleeping patterns, food preferences, social needs, and bodily functions. Sims must learn their Infant's Quirks and adjust their parenting style to fit them. This will make raising them easier if they know what things to avoid or do more of.

All Infant Quirks in The Sims 4

Each Infant can have up to three Quirks simultaneously, with 19 possible Quirks in the DLC. See below for a complete list of all the Infant Quirks.

Quirk	Description
Early Riser	These infants like to wake up at sunrise.
Feeding Tinkler	These infants are likely to pee on their caregivers while being fed.
Free-Air Tinkler	These infants are likely to pee on their caregivers during diaper changes.
Frequently Hiccups	These infants are more likely to have hiccups.
Frequently Sneezes	These infants are more likely to sneeze.
Gassy	These infants have stomach issues, which cause them to be fussy.
Good Appetite	These infants aren't picky and will eat most foods
Happy Spitter	These infants are more likely to spit out their food while eating.
Hates Bedtime	These infants have trouble going to sleep.
Hates Being Held	These infants don't like to be held.
Hates Wakeup Time	These infants usually wake up in a bad mood.
Little Babbler	These infants are constantly making noise and babbling.
Loves Being Held	These infants like to be held and get upset when put down.
Loves Sounds	These infants enjoy music, TV, and other noises.
Loves Wake-Up Time	These infants usually wake up in a good mood.
Messy Eater	These infants make messes when eating.
Picky Eater	These infants don't like most foods and get upset when they eat something they don't like.
Self-Soother	These infants are able to calm themselves down when upset.
Snuggly Sleeper	These infants will only fall asleep easily if held or in a back carrier.

Infant Quirks are locked in once players get the notification, but they can add, remove, or clear them using cheats. To access the cheat menu, do the following:

Open the cheat box by hitting CTRL + SHIFT + C (PC), COMMAND + SHIFT + C (Mac), or hitting all the triggers (Console)
Type testingcheats true or testingcheats on and hit Enter
Hold down SHIFT and click on an Infant
Select "Pack Cheats..."
Select "Expansion Packs..."
Find and click "EP13 - Growing Together..."
Select "Infant Quirks"
Add or remove any desired Quirks

All Infant Quirks can be viewed under their Simoleogy profile. Additionally, players will be notified whenever their Sims notice a Quirk assigned to their Infant.