Elderberry, the young branches of which have been used to make thousands of kazoos for children, teenagers and adults who are delighted to give concerts afterwards, or to mime mermaids and firecrackers. I've also called on the shrub many times for its flowers, which are made into fritters and syrup, for its berries, which are used in cookery workshops or for gentle self-medication, and for its dead stems, which become flying arrows as soon as they are harvested, unless they are used to light a fire by percussion. Above all, the shrub has often been the subject of my passionate comments during guided walks, a habit that one mischievous child summed up so well: « When Sylvain talks about elderberry, it's for a long time! »