The dome of St Paul's Cathedral is a familiar sight in the London sky line. Colour in this fantastic illustration (which also has a great double decker bus) and then write a message to someone on the back!
London - St Paul's Postcard
Colour in the picture of the Tower of London on this postcard and then make a trip to the post box to send it! Its easy to make; just print it out and stick the two sides together.
Tower Bridge is a famous London landmark and the fantastic illustration on this postcard shows it rising up to let a boat through. Postcards don't need too much writing so are good way to get reluctant writers going!