Paper plates, cardboard, glue
"If you can get hold of two paper plates you can make a letter holder for your house.
Cut one of the paper plates in half. Glue it to the other plate by its rims. Finally glue this pocket to a rectangular piece of cardboard.
Colour and decoarate the cardboard with pictures cut from old magazines.
Your letter-holder is ready. Write the word 'Letters' at the top and suspend it from a wall."