This is also part of my summer project- I have to create A5 image communicating my age.
When I was born my uncle planted a tree outside my grandparents house. To most accurately determine the age of a tree you read the marks left by different seasons. I find I mark my mental age by thinking about the changes I go through different periods in my life (...seasons). There are 19 rings in the trunk of a tree, which is my age.
Also, I love trees!