We like our Sundays to be as lazy as possible. Ideally, we don't make plans till I have had my morning coffee and the kids are fed breakfast.
The idea of walking aimlessly at malls is so unappealing. Shopping with kids is just as bad, unless I need them to be present for the purchase.
Sunday brunch is always a welcoming thought.
Or just strolling anywhere that offers a view of greenery and constant breeze.