Thinking about it, we could easily have a Kit/Patch delivering things such as--
mobile chair things or play mats that give you the option to help babies and toddlers with tummy time and or settle down while the parents cook/pop into another room somewhere.
Edit swings so you can choose between a baby seat or a regular one.
Playpens to keep the toddlers contained and to use as punishment should they make messes.
Changing tables to help keep Junior clean and get them ready for the day, plus maybe introduce a storage system for the clothes you can make babies with the knitting skill.
Actual cribs, escapable however made harder if a skilled parent upgrades it, also comes in double/triple for larger broods.
Teething toys, purchasable via the medicine cabinet or computer.
More toy options in general, maybe some music things to aid future band legends, plus the ability to make toys by handy sims.
Toddler tables/chairs to give them their own kitchen space/tea party area can also put toys to use as other sims.
Ability to bathe babies/toddlers in sinks.
Automatic rockers, keep the little ones asleep or soothe them on a bad day, possibility to be stolen by cats and small dogs.
Strollers/Option to hold a toddler's hand as you walk outside.
Chance to smash vases/valuable objects.
Various edits of furniture to suit a nursery and be used by a toddler/baby instead of just meant to look good in the corner.
