How to age up infant sims 4

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Last updated: April 4, 2026

Quick Answer: To age up an infant Sim in The Sims 4, you can interact with them once they reach the required age. For babies, this is typically around 3-4 Sim days. You'll see an option to 'Age Up' when you click on the baby, which will then transition them to the toddler stage.

Key Facts

Overview

The Sims 4 introduces a new life stage, 'Infant,' which bridges the gap between newborns and toddlers. This stage brings a wealth of new gameplay mechanics, interactions, and challenges for players. Understanding how to progress your Sim from the infant stage to the toddler stage is crucial for experiencing the full spectrum of family gameplay in The Sims 4.

What is the Infant Life Stage in The Sims 4?

The Infant life stage was added in the "Growing Together" expansion pack and represents the earliest stages of a Sim's life after birth. Before this update, Sims went directly from Newborn to Toddler. Infants are more interactive than newborns, requiring a wider range of care and attention. They can be held, fed, changed, and put to sleep, but they lack the mobility and independent actions of toddlers. This stage is characterized by significant growth and development, with infants learning to sit up, crawl, and eventually walk (though the crawling and walking are more associated with the toddler stage, the progression towards these milestones begins here).

How Long Does the Infant Stage Last?

The duration of the infant stage in The Sims 4 is tied to the lifespan settings of your game. By default, the game is set to 'Normal' lifespan. On this setting, an infant Sim will typically remain in this life stage for approximately 3 to 4 Sim days. This is a relatively short but crucial period where parents and caregivers must focus on meeting the infant's needs and fostering their early development. Players can adjust lifespan settings in the game options menu to make life stages longer or shorter, which will directly affect how long an infant stays an infant.

How to Age Up an Infant Sim

Aging up an infant Sim is a straightforward process, much like aging up Sims in other life stages. Once your infant Sim has reached the end of their designated infant lifespan (around 3-4 Sim days on Normal lifespan), they will be ready to transition to the toddler stage. You will notice that the infant's needs and moodlets might reflect their readiness for the next stage, or simply the passage of time will trigger the event. To initiate the age-up:

  1. Select the Infant: Click directly on the infant Sim.
  2. Look for the Interaction: A pie menu will appear with various interactions. Look for the option that says 'Age Up'. Sometimes this option might be under a 'Care' or 'Family' category, depending on the context of the interaction.
  3. Confirm the Age Up: Click on 'Age Up.' A confirmation prompt might appear. Confirming this will trigger the aging-up animation.

The infant will then transform into a toddler. This transition is marked by a celebratory animation and the infant's appearance changing to that of a toddler. The toddler will then have access to new interactions, skills, and a more independent personality.

What Happens When an Infant Ages Up?

Upon aging up, your Sim will officially become a toddler. This is a significant milestone in The Sims 4, unlocking a completely new set of gameplay experiences. Toddlers have:

Can You Control Aging in The Sims 4?

Yes, The Sims 4 offers robust options for controlling the aging process. Within the game's options menu, under 'Gameplay,' you can find settings for 'Age Span.' Here, you can choose from:

Additionally, you can age up Sims individually using "Age Up" interactions on birthday cakes or through cheat codes. For infants specifically, if you wish to prevent them from aging up automatically, you can disable aging for all Sims or use cheats.

Tips for Managing Infant and Toddler Stages

The infant and toddler stages are demanding but rewarding. Here are a few tips:

Mastering the infant and toddler stages in The Sims 4 adds a significant layer of depth to the game, allowing for rich storytelling and engaging family gameplay. By understanding how to manage their needs and facilitate their growth, you can ensure your Sims have a happy and healthy start to life.

Sources

  1. The Sims 4 Growing Together: Meet the Infants! | EAfair-use
  2. Infant | The Sims 4 Wiki | FandomCC-BY-SA-3.0
  3. The Sims 4: Infant Life Stage Guide - IGNfair-use

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