Tetris remains one of our favourite free games for kids and adults alike and the rules of these Tetris games are simple and well known. Despite that, we're going to repeat them here coz we're like that; helpful, friendly, but with a slight suspicion you're really thick and need all the help you can get. No offence intended. So, thicky, as the shapes scroll down the screen (that's the brightly lit rectangle in front of you), you have to move and rotate them to complete one or more horizontal lines. Horizontal, now that's a big word isn't it? Anyway, enough reading for one day, we don't want your brain to hurt by over exercising it do we? After you've played Tetris, why not check out and play our other free kids games, or perhaps lie down in a darkened room and practise counting to ten, or even five if that's all you can manage.