We live very close to my children's school so even on Winter days, we walk. It's a good exercise for all of us. Sometimes, my husband would drive the kids in the morning when he goes to work but when there is a two-hour delay, we have to walk. Going home from school though, we always walk everyday. I can drive but I chose not to, we can benefit more from walking than riding.
I am so glad that my children are used to it that you will never hear them complain about it. In fact, they enjoy it as we play in the snow on our way home. Last Thursday was fun because we were walking on top of the snow and every time our feet would go down, the crunchy sound of the icy snow was fun for them.