Wowsers! He is well able to sit up now!! And so much more. But I've literally just watched a video of him doing exercises to try learn to balance. The videos are a great great thing to see all the phenomenal improvements and progress. Cringey maybe, but the body is a wonderful thing. It's amazing what the body can re-learn to do with re-training. Every single solitary minute but oh so important and powerful exercise helps so much every little bit. The proof right there is in all the videos. :)