Step 1:
Cord or Small Rope
Plastic Jar with lid
PVC pipe
Frisbee
1/4 inch dowel
Glue
Paint or markers

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Midori
Top marks!
I used 1 1/4 PVC which is a good size for the smaller birds. Unfortunately the squirrels wanted bigger holes for easier access and destroyed the jar in just a few days. So if you have squirrels I recommend posting a ‘NO SQUIRRELS’ sign or glue a small ‘rope’ of stainless (so it won’t rust) steel wool around the edge of each opening so they cannot chew the plastic to shreds.
http://www.vtnews.vt.edu/story.php?relyear=2009&itemno=237