Just a quick note to say that the poll has now closed and the March Challenge theme is "Geometry / Angles". Thanks to everyone who contributed a suggestion and / or voted. I look forward to seeing your interpretations (the more the merrier!).
a) The challenge is running
b) The subject is "Geometry / Angles"
c) The idea is to try something that you normally wouldn't
d) The challenge is running until the end of March
e) We've had quite a lot of interest in the polls, but not all that many pictures posted!