|summary=Mattie Butterfield is a worrier. Well, it's not surprising with a family like hers - something always seems to be going wrong. Or if it doesn't go wrong then it very easily ''might''. She gets upset that the tomato seeds which she and Lucinda have planted at school won't thrive because they're in the cold, dark cupboard and they're all wet. Lucinda's parents don't seem to like each other very much and it might be that they're going to get divorced. What would happen if Mattie's parents stopped liking each other? Why does grandma seem not to like the Butterfield children very much? You see, when you think about it, there's lots to worry about. And Mattie is particularly worried about why Mum has been to the doctor.