Have you heard of Vi Hart? She has a whole website where she doodles -- and shows mathematical patterns that come out with doodling and playing. Not arithmetic. But beautiful, complex, stunningly cool math.
This particular video has given my child great things to draw when waiting in a restaurant.
They say, actually, that the best way to help your child succeed in math is to make math part of their everyday life -- and not just the drudgy part, either. According to this list, playing math games and just general games with numbers and concepts is just as important - if not more so - than all of those flashcards.
I like that.