My father had a friend who was an amateur astronomer. He had a cemented base with a tracker built into his backyard. When I wanted to build a telescope from PVC for the science fair, we went to his house for the lenses.
I spent more time admiring his model railroad setup, a whole town around a harbor with a drawbridge. A tugboat with rippling wake molded into the colored glass water. The whole thing was around 10' x 10' in his closed-in patio.
That's when I decided to copy him and build my own 8'x8' HO scale diorama.
I started collecting my first train and extra track. Got magazines with ideas for making miniature foliage and paper mache mountains, had light-up buildings ... , then we moved onto a boat and all I had was a set of 4 cubby holes at the head of my bunk to store them in. What space wasn't taken up with model trains was filled with 1/32nd scale WWII army models. I remember using a steak knife and our gas galley stove to cut the soldiers up and reglue them into new positions, melting a row of machine gun bullet dents into the side of the half-track and reading about how to weather my models with dry-brush painting.
I also built fighter planes. I was a mustang fan while my brother loved the corsair. Hung a whole dogfight scene with about 8 different planes from the ceiling of my grandmothers guest room, cotton smoke trailing behind the enemy planes.

Oh, the memories.
- Will (Dragonfly)