A housing charity is testing the success of a direct mail campaign that gives recipients the chance to construct a tiny cardboard home.
Habitat for Humanity, which aims to eliminate slum housing globally, has mailed 40,000 potential new donors a pack containing the miniature replicas.
The organisation hopes that giving people the chance to build a two-inch version of the homes it wants to build in Ethiopia will spark their interest in the cause and lead them to support it.
The pack is being tested to see if it outperforms its long-running key ring gift. The mailer, created by Whitewater, also contains information about Ethiopia's slums and how 100 donations of £17 would enable the charity to build a new home.