Thanks for the replies, somerdai, ColinsMum, and MumOfThree. I'm much obliged for your time and feedback!
I appreciate that in the early years, individual environment and interests can drive a lot of the variation in expressed ability of children with similar levels of giftedness. It's still valuable to me to understand how a known gifted sample behaves as a benchmark because, frankly, I'm learning about this on the fly.
I see elements of my husband and me in my son. At 14 months, I was more verbal and musically/artistically inclined. My husband was more physically advanced and had an engineer's mind, like our son.
The passions we've seen lately are construction (thank you, Ikea!), cooking, vehicles, and disassembly. It was getting so obsessive that my son would wake up first thing in the morning and ask for a hammer. Pronto! His new thing is doing rounds of Grandma's house doing imaginary repairs to cabinets, tightening screws in door hinges, etc.
