Why don’t you just have him draw something like you said and maybe you can write his narration with it. Or don’t write anything. You might still be able to use the jr. notebook for that.
My two older boys are doing Apologia now. My oldest, who is almost 13, has enjoyed doing these on his own (with the notebook) for the last two years. And, my second oldest, who is 11, just started Apologia’s swimming animals with the jr. notebook about a month or so ago. The 11 y.o. is dyslexic and has had a very hard time with the physical act of writing. So I read him the book and he does the notebooking. He is really loving this course. But, let me encourage you – this is a very recent thing that he really enjoys the notebooking and I think the jr. notebook helps. Last year we tried this program and he was not so enthusiastic. So we dropped it. He just wasn’t ready. Both my boys (and a lot of boys, I think) do not love writing. This is the first formal science they have had and until now we did some HOD and other living books and just exploring on our own. I know the Apologia books are supposed to be for ages K through 6th, but I feel at least for my kids they are enjoying and getting so much more out of them now that they are older.
So, anyway, be encouraged that things will change as he gets older and living books are a great way to keep his enthusiasm for science. Just explore things he is interested in.
Kristen