When I was younger, I was obsessed with climbing the trees in my backyard. We had many different kinds. There was the apple – which I had planted myself –the oak, and a few willow trees. On one of the sunniest days of summer, a few weeks before I would begin the fourth grade, I squinted my way through our backyard. I was running after our pet rabbit, which I had accidentally let loose. He was much too fast for me, however, and I breathlessly gave up the chasing and hoped he would tire himself out. I looked around the yard and smiled at one of the trees closest to the house. It was our favorite, giving shade to use and adventure to seek…