Welcome back to the hobby, and welcome to the Herd, to you and your son!
If I may offer a tip for your son for building at his age-let him do whatever he wants. Gradually he'll pick things up. Some dads want to interest their kids in they hobby, but innocently expect them to become IPMS first place modelers out of the gate. That tends to discourage the kids. Let him twist parts off the sprues, smear glue, and ignore FS color numbers, and just enjoy building.
I look forward to seeing your projects here!
Best regards,
Brad