Use papier-mâché as a form for polymer clay dolls and figures.
Tutorial for how to make miniature decorative bird cage - interesting technique with sticks stuck into styrofoam - easily modified for realistic cage. Good because I never have birdcage just laying around.
Dolls' Postbox Craft - we love all this cute little crafts to add to our doll's house. This is an adorable matchbox crafts and comes with free envelope printables too!