There are a whole load of older\cheaper portable MP4 players on the market are really cheap prices. Problem is that many of them want their video in as a .MTV. What's the best free software for converting video to .MTV. Yes, I know that the battery life will be low, and the sound is rubbish, and the video is really low res, but they are affordable enough that you can give them to the kids to take places that you'd not let them take a tablet or an iPhone. Or they could take them to school in places that won't let you take expensive electronics or phones.