We live in Manhattan and we love the hustle and the bustle of the city life, but we also love communing with nature on weekends at our woodsy retreat in the Connecticut foothills. On one recent country weekend I came home from the market with a load of groceries and parked in the cul de sac in front of our garage, a few yards from the house. I got the shopping cart I keep in the garage and unloaded the grocery bags from the car. When the cart is full I find it easier to push rather than...