Currently inZOI has a baby stage and toddler stage and visually they don’t look that different. The major thing separating a baby and a toddler is that one is stuck in the crib.
I think most players would agree that the toddler stage should be a period of which the toddler Zoi can walk around with more realistic behaviors/needs.
We also need things like toddlers being able to sit in high chairs to eat certain foods and can make a mess when eating, or crying and fussing even while being carried if they aren’t in the mood.
Ideally there would be a stage between toddler and child, “preschooler” or something.
A stage mid-height between a crawling toddler and a child zoi.
That stage, with a revised height for the Adolescent would complete the aging process perfectly in-game.
If they do split it like you ask, better make it a stage on it’s own and make the crawling part (toddler) last 3 days and the preschooler 3 days (to fit the current age group length, subject to change eventually either by devs or by us once we finally have control on age group length.
Agree though, that extra stage would be super fun !