Wolf Elective 13F is to put out a bird house. If you build it, you can also get credit for Wolf Requirement 5E (Make a bird house). But this doesn't have to be a complicated thing. Check out this easy bird house you can make if you have swallows in your yard ... http://www.npwrc.usgs.gov/resource/birds/birdhous/swallow.htm
It's simple and easy and can probably be made from scraps of wood laying around the house or shed.
This activity fulfills the following:
one of the requirements for the World Conservation Award
Wolf Elective 13F
Wolf Requirement 5E
If you use a hammer to build this project, you can also get credit for Wolf Requirement 5D and Requirement 5C if you screw it together