Fewer children are walking and biking to school, and more children are at risk of becoming overweight. The simple act of walking to school can add much needed exercise into a child's daily routine. A walking school bus is a group of children walking to school with one or more adults. Getting into a healthy routine early is as simple as walking to school. Every October, International Walk to School Day gives children, parents, teachers and community leaders an opportunity to be part of a global event.