Dear friends, probably some of you experienced some problems in explaining your students or partners what they must do on the court. Probably you dreamed about some drowing device for that purpose. You can easily do it yourself, as I did. I have printed the image of court on a A4 sheet of paper, cut a piece of tin (from old tea can, but this arbitrary ), placed them in a transparent plastic file, and sticked it with a piece of tape. Then I've bought a set of coloured magnets, easily erasable whiteboard marker, and porolone sponge. You can see the result on the attached image. Also you can follow this link to find thoroughly painted badminton court image scaled so that 1 pixel is equal to 1 centimetre.