Non-binary child changing their mind...!

[MooPointCowsOpinion]

After supporting my child who came out as non-binary last week, sorting things with the school and supporting them in coming out to family and friends, they have said maybe they just did it to make themselves feel special and perhaps they want to stop now...!
They’re 10. They’re saying they will stay non-binary for a bit and then maybe change back to a girl... How likely is it to have just been a phase? Should I be exploring gender fluid as an option for them? Or am I just supposed to go with it while they test things out?
Argh help. I just want to be supportive. There’s a chance they have special needs so we are currently on a waiting list for testing for that too. I don’t know how much one affects the other or what to do for the best!

Have you any inkling of how long she (they?) had been thinking about gender before "coming out" to friends & teachers, & have you talked about why they're changing their mind now? It's entirely possible that this was something they announced on a whim & have now changed their mind about, but it's also possible that their gender is something that they've sat uncomfortably with for years, that they've received bullying & pushback in the last week, and that this makes them think it would be easier to claim "maybe I just did it for the attention" & go back to being seen as a girl... and those two situations have very different likely outcomes in the long run.

Other posters have advised helping them discover & explore interests and hobbies that might suit them, making sure they know that gender is not the entirety of anyone's identity, and affirming that they can be uncomfortable with some traditionally-feminine things while still being a girl: I'd echo all of that advice. I'd also ask what actually changed, or what they asked to change, when they came out as nonbinary last week? Did they ask people to call them by a different name, or let them play sports with the boys? If they want to join a mixed sports team, or adopt a nickname, or dress a different way, or get their hair cut shorter... those are all things they can do regardless of gende. They're also things that are easily reversible if they decide they don't like them after all (well, the hair might take a while to grow back, but it's hardly irreparable damage!), and ways to explore what makes them feel comfortable & what doesn't. It might be worth focusing them on that question—"what makes me feel comfortable?"—as something easier to answer and less scary than "what's my gender?", and something that'll have a positive impact on their life if they can figure out answers to it.