My DS was sliding the greenhouse door to and fro and saying 'Taxi Door' (His nursery taxi has a sliding door). He also says that the cats' toy goldfish is a helicopter ( the shape and position of fins make this plausible). Realistically I know he is probably just seeing a phsyical resemblance but at what point can it be said to be rudimentary imagination?
If an NT 18 month old says a block of wood is a car and says 'vroom vroom' what makes that imagination and not just seeing a similarity?