When my son Levi was around 10 we used to build 1:72 aeroplane kits together, me supervising unless he got a particularly fiddly bit, and he had them hanging from his bedroom ceiling.
On the modelling front, I normally avoid Airfix for WW2 German aircraft as they don't include the swastika tail plane decals. It's history, for right or wrong, but model kits are classed as toys, so apparently it's illegal to include them.
Any German aircraft I tend to get are Tamiya models kits which do include the correct swastika decals, and there is sometimes 2 spare, so I might occasionally get an Airfix model as I can get the markings right.
Every model I end up researching for correct markings, camouflage and the like as box art or instructions are sometimes incorrect.
I did spend a lot of time researching HMS Hood and the Battle between Bismarck and Prinz Eugen.
Airfix and the scale models built which were photographed on Hood, all had red anti-fouling paint on the hull. Research showed she actually had grey anti-fouling.