I know you didn't say that to get suggestions.... but....
Sometimes there are friends that are single Moms whose child could really use the company of a grown man sometimes, especially the influence of a good one. I know it is not nearly the same, but some little fella would probably love to build with you sometime.
I don't have children of my own either. Life was crazy and had more unexpecteds than expecteds.... ha ha .... and that's just the way it is. I have two brothers & two sisters. My two brothers and my older sister each have 3 (now grown) children and my younger sister has two (her youngest just finished college and passed her licensing exam a couple of days ago to be an RN !). My younger brother just became a grand dad for the 9th time this morning (OMG!).... and they call him Captain..... for no good reason ! ha ha (my brother, not the baby !) There are more grands too.....4 more ! .....and life goes on.
That looks like quite the complicated build. Having some good music going on while enjoying a fun hobby is the best.