Everyone who has headcanons about Steve and/or Bucky being awkward with babies and/or small children,
I understand the impulse I truly do I get it, however have you instead considered them growing up poor in the Great Depression and thus in a crappy apartment complex where every adult is working their fingers to the bones when they can find work
and thus a young Steve caring for many an infant when he was well enough to be responsible for anything other than lying in bed and breathing?
and thus a young Bucky watching over dozens of under five year olds at all ages over ten?
And later, Steve taking care of neighbors’ kids when the parents were sick because that’s what had happened for him when Sarah was sick and dying and dead?
And Bucky being a huge hit not just with the ladies he took out but also their little siblings who he’d play with when he arrived to pick her up early and she wasn’t finished getting ready?
Steve and Bucky accepting child-wrangling as a totally normal life skill, just like shining shoes and darning socks, makes 1000% sense to me.
Steve tries to be slightly too Cheery at them a lot of the time, so he’s better with younger kids; meanwhile Bucky is mildly unsettled by this becoming a rarified skill.