I don't think this was the most unusual thing I did as a child, but it is what comes to mind tonight. I used to arrange my bedroom according to travel trailer layouts in brochures. This was before I was ten years old. There was a pop-up camper dealership next door to our house, and I used to go there with my father and go through those campers a lot---then I would make my room look like them (the best I could) with help from the brochures.
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"My journey has just begun."