Add a bit to my first entry.
I was riding my bike in the neighborhood and spotted Steve hammering 2X4's to a tree. Hey, what's you doing? I want to build a tree house. The first 2 doable limbs were 20 ft off the ground. Then Aimee the younger next door neighbor came out and asked Steve how it was going. I fell
in love with Aimee, yet a lot of years younger than me at the time. We went to the school and collected material to be used on the treehouse. We used 2x4's and 3/4" plywood for the floor. Almost squared we use 1/4" plywood glass crate material for the roof.
Got the last piece of roof on as a storm rolled through. Aimee hung onto me for dear life.
A friend's younger brother married Aimee. When we met years later she whispered in my ear, you never returned to the treehouse.