- Simply go to IKEA and get one (or more) of those cheap RAM picture frames in the size you want.
- Use a blank page of printer paper in the size of the frame, or print out a background for the whiteboard, like a calendar, or a to-do list, etc.
- Assemble back together and voila! your whiteboard!
- You can even glue on some scrap wood or cardboard to make a marker-holder. (see picture)
NOTE: some whiteboard markers are more 'permanent' than others. Mine was pretty hard to erase after a couple of days, so I replaced the standard 'window' with plexiglass, which is much easier to erase the ink from.
I saw there was already a similar instructable on this subject here: www.instructables.com/id/30_Second_Whiteboard/ but I thought I still had to post this, due to its cheapness ;)