This gave me the idea for a tree formed out of verticle cursive handwritten lines of poetry.
For a group kids' project: cut out tree form from brown butcher's paper, and have kids fill it with their own nature-inspired poetry or their favorite existing poetry. Create leaves, birds and other embellishments out of appropriate poetry snippets or descriptive words and phrases.
For the wall of a bedroom, or just some art anywhere in your house: lightly sketch a rough tree outline using pencil, then fill it in (also with light pencil lines) with cursive poetry, writing from bottom to top and top to bottom, possibly in a continuous line. When satisfied, re-trace all of it using brown paint and a small paintbrush. A sample-sized container from Lowe's should be plenty, even for a large-scale tree!