I'm finding it strange that my 5 year old son, (very nearly 6) doesn't role play with 'human' figures and instead replaces the humans with cars or vehicles. For example we bought him the police car and helicopter playmobil recently and all of the 'people' were on 'holiday' (i.e. in a pile on the floor) and the police car and helicopter were being driven and piloted by cars. He also has the farm set and some of the Roman playmobil and various lego sets and he does this with all of them.
He shoves piles of lego bricks in any other enclosed toys; for example I've just found lego bricks stuffed into the Playmobil dog kennel. I figured previously that he may not necessarily know how to 'role play' with his other sets, so I bought him the police set (at his request) figuring he knows what policemen do.
My concern is he seems incapable of playing with any of the human toys and replaces them with vehicles or that then act like humans. I'm curious to know if anyone else has experienced something similar? Is it a phase or is it perfectly normal? Any shared experiences or insights would be appreciated as it's quite frustrating to watch, I fear that his imagination is quite limited, but I have considered that maybe it's actually mine.