Summary Upcycling a tin can to turn it into a bird house using 3D printed clipped lids. These models were made a while back for project RE_, but now they are FREEEEE! Come and vote for me on Instructables Make it real challenge! http://www.instructables.com/id/Project-RE-by-Samuel-Bernier/ Instructions Open a used 4 inch diameter tin can on both sides. Use a normal can opener, the ones that leave the lip intact. Print both front and back part. Remove support. Nail or screw the back part unto a tree or a wall about 1 to 3 meters above ground to attract eastern bluebirds. More models for different type of birds will come. I suggest to use ABS with a FDM machine to have a good clip!