DS just turned 6 has high functioning autism. He is obsessed with emptying bottles of shampoo, shower gel, bubble bath etc.. Up its cost me a fortune this week, replaced everything Today (again!) and he has done it again tonight. I told him if he did I would ban him from his new DS for a few days. I got him to repeat it and he did and said he understood. Any ideas as to why he does it please and how to stop him?