There are some modeling brands with impressive detail; like https://store.killerbody.com/ and https://www.asiatees.com/ (not to advertise) since they are quite expensive, I can't afford to buy one.
But with my 3-year-old nephew I am putting together a truck with homemade parts, I build them and I put it together with him.
The expression and desire he puts into building his toy is impressive, he looks for me every week to continue with the project.
I think I'm teaching him something.
For me it is a gift to spend time with him.
greetings.