Thank for letting world know about it. But don't you think that flash cards are not much popular now. Or may be someone have different opinion.

No not at all but work pressure may bring harm to creativity. Try to give free hand to your children in vacations. Try to observe his behavior and interests. Give him little task about mathematics puzzles, sports activities, drawing, books etc just to identify what attracts you child the most and share you findings with your kid's teachers. It will help them to assess you kid and to give him better consultancy.