Rosemary Hobday, a member of the West Herts team of the Hertfordshire Fostering Services, explains to Jill Burridge the ongoing need for foster parents, especially for young children and teenagers.  A foster parent with experience of fostering both a teenager and younger children provides a picture of what its like, how it works, what support is provided - and above all how rewarding the experience has been and remains for her and her family.