The color of infinity inside an empty glass

I think it may be more of the 'nurture' aspect, just by going with my experiences. One of my favorite toys was a yellow Tonka dump truck (the metal kind-remember when they were made of metal?) I would transport things all over the house with it, or I would let my stuffed animals 'drive' it. I REALLY wanted to take it outside to the sandbox, but my mom told me if I took it out there it would be an outside toy and wouldn't be allowed to play with it inside. Of course, it didn't help that my dad took me to the gravel pit with him to get the sand for my sandbox and I got to watch the backhoe load it while my dad told me to feel the weight change with the truck we were in. Dad was always teaching me to make observations.