I know it sounds silly but I've thought for a while that martial might be good for DS (discipline/focus as he has adhd). Anyway his current obsession is lego ninjago so it's a good opportunity to give it a go. They talk about 'spin jitsu' so I thought maybe jujitsu, although probably doesn't matter too much. Does anyone know much about them and what might be best for an 8 year old with adhd! Thanks