I think so. I've made a family with kids before, but you don't get to choose as many traits, because they didn't have a natural aging up I guess. Like when your baby ages to toddler and to a child you can choose a trait if they have aged successfully (learning all the traits they need to). I think some traits are chosen for you too. So, I'm not sure it maybe be assumed they didn't succeed in learning their traits. If you see clumsy as one of their traits it means they haven't learned to walk as a toddler so I guess you just have to see.