How to age up infants to toddlers in The Sims 4

How to age up infants to toddlers in The Sims 4
Images via Maxis

Written by 

Kiera Mills


17th Mar 2023 18:55

With the newest update and expansion pack, The Sims 4 Growing Together, we now have the infant life stage in the game. You may be wondering what's different about the infant life stage and how to age infants up in The Sims 4.

We're here to tell you the steps you need to do to age up your infants into toddlers in the game.

  • If you want more sim children but don’t want to wait the three-day pregnancy time, check out our guide to all Sims 4 pregnancy cheats and get a baby instantly.

How to age infants into toddlers in The Sims 4

How to age up infants in The Sims 4
Click to enlarge

Infants operate like any other life stage in the game. Currently, babies are the only life stage which can be 'aged up' by clicking on them.

If you want to age up your infant you'll need to make them a birthday cake first. This involves clicking on a fridge or cooker in your kitchen and selecting the option to 'cook' a dish. From the selections available choose a cake, this can be any cake even a simple white cake.

Although it may not make sense, the cake options fall under the 'cook' instead of 'bake' options.

Now you have a cake made, make sure you immediately place birthday candles on it before sims have the chance to take a piece. Once a piece has been taken from the cake you cannot add the candles and age up the sim, rather, you'll need to make a fresh one.

To add the candles and fulfil the age-up follow these steps:

  • Click on the cake.
  • Select 'Add Birthday Candles' for 10 simoleons.
  • Select the cake again.
  • Select 'More Choices'
  • Now, select 'Help Blow Out Candles...'
  • This will bring up a list of sims in the household that are eligible and the correct age to help.
  • Select the infant you wish to age up.
  • Your sim will pick them up, carry them to the cake and help them blow out the candles.
  • Your infant will now age up like any other sim.

How to age up infants with cheats in The Sims 4

The Sims 4 CAS mode cheat
Click to enlarge

If you would rather avoid any baking disasters you can use cheats to age up your infants.

To do so, bring up the cheat command box by pressing the following:

  • For PC users - CTRL + SHIFT + C
  • For Mac users – Command + Shift + C
  • For console players – press all four triggers.

When the box pops up in the top-left corner, type the following to enable cheats in your game:

testingcheats on

Then, input this cheat:


Now, hold shift and click on a sim in your household, then select the option to 'Modify in CAS'

This will take you to the full version of CAS where you can set the age of your sim (this doesn’t work on babies as they are technically classed as objects but should work for infants).

All infant milestones in The Sims 4 Growing Together
What are Family Dynamics in The Sims 4?
How to have a Science Baby in The Sims 4
Are there strollers in The Sims 4 Growing Together?
How to host a baby shower in The Sims 4 Growing Together