One day you'll lie on the couch with a magazine, occasionally offering helpful suggestions to your children as they make you dinner, and it won't even be Mother's Day. Are you laughing? I understand. My kids are 15 and 11 now, and recently they prepared a meal of baked tofu, mashed potatoes, and salad. But when they were little, I never thought that day would come, any more than I believed those chimps at typewriters could someday write Hamlet.