If the appearance of tree trunk cross-sections symbolically tell the tree's life story, why not use these woody models to help your students construct their own arboreous autobiographies? The color, thickness, and ring pattern of each year in their lives could be drawn with Logo Writer, and then shared and compared with those of classmates to see if any patterns emerge. Similar tree-ring histories for schools, historical figures, literary characters, or countries could also be created.
Harris, J. (1991). Arboreal aging. Logo Exchange, 10(1), 24-27.