I live in Denmark, don't have a kids though. While I bike myself I often see parents who transport their kids in bikes with 2 front wheels and a box. They also

I live in Denmark, don't have a kids though. While I bike myself I often see parents who transport their kids in bikes with 2 front wheels and a box. They also got a cover and are thus protected from the elements. Also busses and trains have areas for baby strollers. At some point kids can also bike them self. I don't know how many are completely carless. I don't think I know a parent who is. Most have one car, but also use public transportation / bike when possible.