Take a look at this slideshow about the Heidelberg Project.
Collect things to create your own house. Look in the recycling or find things that are no longer used around your house or school. Some ideas could be:
cereal or other food boxes
wrappers or paper scraps
plastic lids
old toys or pieces of toys
craft supplies (popsicle sticks, paper, newspaper, markers, crayons, glue, etc)
You will need a background - a piece of cardboard would be great! Arrange your found items into a house collage!