Her excuses are as good as yours, maybe better. The reason she can't find time to get to the gym is that she's too busy doing other things. So order her up a mini-gym of her own, courtesy of Avon, the people who made home delivery of cosmetics a way of life. The company's new Wellness series includes a full line of workout equipment from Bally Total Fitness. Get her the exercise ball, $23; and neoprene dumbbells with handles, $6; instructions included with all, 800-FOR-AVON.