Every story my son writes for school is about the same video game
He's in grade 2 at an IB school, where writing is mostly free stories and journals. For the last two months every single one has been set inside the same video game he plays at weekends: same characters, same levels, occasionally a new boss. His teacher seems relaxed about it, and the writing itself is improving, longer sentences, some dialogue. I'm less relaxed. Part of me thinks any writing is good writing at seven, and part of me thinks he isn't stretching at all. Do I nudge him towards other topics, or let it run its course?