following a streamside trail through a maple-oak woodland, dabbling bare feet in a cool creek on a hot day, the smell of rain on warm concrete, the friendly mechanical scent of old CPUs, warm spring midnights and chilly autumn mornings, partial clouds and gusty winds, fresh green herbs and ginger, strong black tea (no milk or sugar), bright exoskeletons and translucent wings and jointed legs, a colorful tin toy spaceship and child's microscope, exploring public buildings when no one else is around, stargazing and sharing secrets, inside jokes that aren't objectively funny and are impossible to explain