@tokyo_0 No he is quite far behind on the whole impulse control thing. We've tried a few long and short term experiments in various areas and the answer seems to be "the things his phase of life is demanding {e.g. knuckling down to x hours of homework per week) are things his development path will have him ready for in 2-3 years".
Saturday is basically unlimited and has been for 2 years and he just sits the whole day glued to the screen.