In Blade Runner, it seems to me that making small replicants would be illegal for the same reason that replicants were hunted on Earth even though they were small. Was Sebastian using a combination of replicant technology and mechanical parts to make his "friends?" Is this explained anywhere in books, because I am pretty sure no details (in any version I have seen) are provided about the tech Sebastian uses although we know he works professionally helping to create replicants.
EDIT: Two things, one which might be a separate question.
- Firstly, which is related to their nature: clearly they are not very intelligent, almost lacking in intelligence at all but more like the windup toys they sort of resemble as they bump into things and repeat phrases irrespective of what is going on. But at the same time, I think a saw one of the "toys" look concerned or afraid when the replicants were doing something threatening.
- Secondly, I recall that one of the toys resembles Leon (the replicant whom Rachel shot) -- I wonder if that resemblance was intended by the director/writer -- perhaps they wanted to show that JFS was using replicant technology to create the toys by this resemblance.