Re-reading my first post of February I'm reminded how quickly things can change. He's now very much into drawing and some writing on his own. His violin is still a teeth-grinding challenge to our patience but mostly because he has such capacity (he can now play a tune he hasn't been taught or practiced) but generally will do only what he wants or can be somehow convinced to undertake. The simple stuff is the hardest. A token economy (earning them for practice) is bearing some fruit and we took some away for the biting which solicited an effective response.