Just withoit the top.How to make a stone birdhouse (or fairy house) for a garden outdoors. Has link to free instructions. Great tips on sealer, glue, roofing choices, etc. One pinner suggested using PVC pipe for the house, and a funnel for the roof.
Shining Lamps with Plastic Bottles! Another ingenious way to create a set of recycling lamp shades from plastic bottles. You can change the color or add prints or accessories to make them in your style.