My first childhood experience with a treehouse failed miserably. Or, I should say, my father’s attempt to build my siblings and me a treehouse was an embarrassing failure. (Sorry, Dad. I know you tried). His intentions were sound: Use a hexagonal-shaped wooden hot-tub cover as a base to put on top of our old swing-set posts and build up from that with walls of leftover fence boards, then fashion a roof and voilà, we would have our very own fort in the trees…