Sand Pen is perhaps the biggest, not to mention the heaviest and most fun, writing tool on earth!
This huge upside-down cone on wheels is filled with bright magenta sand which can be distributed evenly over the ground allowing everyone to write brightly coloured, temporary graffiti messages.
Sand Pen was originally designed for and presented at the Design Biennial in Lisbon in 2011 and was part of the Prelude event of flux/S 3 in Eindhoven in 2011.