Sounds a lot like my Builder Boy. He never pretended to be anyone or anything other than himself, just builds and builds and talks about what his factory is making or his trains are delivering, etc. All very "real world" stuff. He's not pretending to be a factory worker, he's not pretending to be the factory, he's moving things around, explaining the conveyer belt, etc. He's 6 1/2. I used to worry about it, especially since his little brother has been pretending to be something/someone/some animal since he was about 2? But I don't worry about it anymore. He has plenty of creativity. If I asked him to pretend he might go for it for a few minutes, but I think he'd get bored of it pretty quickly.