Yes, this could be a phase. A phase may apply to an interest that lasts a few months rather than several years. An adage has been put forth that a transgender child generally expresses their difference insistently, persistently and consistently. This applies well to some children and not so well for others. A parent sometimes finds themselves wishing a child would express insistently, persistently and consistently as it would seem to point toward specific next steps of support, and yet, their child may express their gender difference in a variety of ways. This may seem as though their child is uncertain or confused. Whether it is or isn’t a phase, what we know now is that supporting a child while they are in an exploratory phase (as one might support an exploration of any other kind) has the best “outcome”. No child has ever expressed disappointment in the fact that a parent supported them in any endeavor whether or not it proved to have any permanence.