This is a good project to do with kids. Just start gathering bits and pieces of junk in a box, or clean out a few drawers, and you soon have enough raw material to create your own little eco warrior tribe!
Any material can be used. On the creature above we have a wine cork body, milk bottle cap feet, Elton John glasses made from a piece of balsa from a broken 3d puzzle, some feathers, a thumbtack nose, and eyes made from nuts. Oh, and the mouth was cut from a newspaper.