tos jim kirk is very funny to me because he is so bad with children. you'd think he'd be good with them, but he isn't. i think he probably likes them well enough, he just. doesn't know how to talk to them. not one bit. has no idea how to interact. kids can tell he's trying, but he's bad enough at it that they don't really like him more for it. type of guy who you'd hand a baby to, and he'd hold it out in front of him with stiff arms. like, um. what do i do with this. he could be coached on proper holding technique, but he'd still look visibly uncomfortable the whole time.
tos spock is Not Much Better. i think that he feels more clueless around kids than kirk does, but kids also like him more. he doesn't have it in him to be mean to a child ever, so all the awkward kids adore him, and he spends the whole time with them sending desperate looks to other crew members, being like, 'help, i am ill equipped for childcare' and everyone around him is like, 'nooo, you're doing great!!!' while the child has a blast and he is wishing desperately to be Anywhere Else. however, he does refuse care of babies. somehow, he is even worse with babies than jim is.
bones, though - he's a kid guy. he loves kids and babies. he adores them, they adore him, it's a win win. and he looks over at kirk and spock Struggling and he laughs and laughs and laughs. (the kids, of course, think this is hilarious, and they join in on making fun of kirk and spock, even if they don't really know what they're making fun of them for.)