The red double decker buses of London are famous the world over. Here's a brilliant postcard to colour in and make yourself.
London Bus 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!