Jogging is one of the best methods of excercise there is. You don't have to stop jogging once you have children. Buy a jogging stroller and go for a run. Typically you will be running through a park. Within the park there is quite the hustle and bustle, especially within the inner city.
Park groundskeepers can sometimes ruin the serenity of jogging in mother nature's settings. Lawn equipment, blowers, hedge trimmers. All can make you realize why you don't bother with that stuff and will push you further to go farther just to get away from the distractions. Peace and quiet is where its at.