Block, block, block.
Just sitting in front of TV and not learning anything or gaining physical exercise is a waste of their time. One or two cartoons are enough per day. No MTV ever. No going to friends' houses where they'll watch the blocked shows. Give them more constructive things to do. Buy them a tent and an extension cord for a fan. Monopoly and Uno. Lots and lots of snacks. They'll spend hours out there having fun--without TV.
tx mom