A snail-mail postcard to the first person to give us the correct name of the South African invention in this shot... no locals though, this one's too easy for you! We'll tell you a little about the history of this clever invention tomorrow.

Today is CTDP's one-month anniversary. Yay, virtual cake and tea for everyone! Thanks to everyone who's joined us here so far - this is turning out to be a really fun adventure.