Yes, he is above average. I think he is on 90% or 95% line now. How old is your son? I have 2 boys, the younger one is 2 1/6 yrs old.
I plan to buy a new vacuum cleaner to clean up the house and air. The salesman showed me this Sunday, but the price quite expensive, it costs HK$18,720. He showed me the result, it is better than OSIM one (my existing cleaner) and many hotels are using this. Hope that really help my elder son.