I’m assuming the toddlers in Sims 4 are 3 to 6 years old. Therefore, I always make them in preschool uniform in their first 5 days
https://i.imgur.com/qhiwwAD.jpg
… and elementary school uniform in the 6-7 days
https://i.imgur.com/jkJQgRM.jpg
I have downloaded a mod to give the children preteen-like body. I will use this starting from their 7th to 12th day.
https://i.imgur.com/TDztxd4.jpg
See the difference between the black skirt girl and her sister in pink dress
Of course I have preteen mod. This mod is amazing. Hope the team can make this life stage comes true.