Toddlers will be old enough to sense changes in their environments. Since they spend most of their days with at least one parent, it's important not to neglect them. Otherwise, when they see the house in disarray and gradually getting emptier, they may worry about being left behind. Quickly allay their fears by keeping their favorite toys around and trying to keep as stable a household as you can during the planning and packing. As long as toddlers are comfortable and are close to their parents, they will not be affected by the move.