There has been a previous Ible describing how to make a trailer-style leaf catcher for a riding mower. http://www.instructables.com/id/Leaf-catcher-2000/ This Ible describes a grass/leaf catcher that sits on ...
Use a utility knife to cut four panels out of one of the garbage can lids (Photos #1 and #2). This will let the maximum air flow exit the can. I left enough plastic to have good support for the handle.
Next I made a retaining ring out of 14/2 house wire. I cut a length of the wire that would exactly circle the inside of the lid where I wanted the screen to be. I slipped the jacket off one end of the wire by clamping the wire inside in a vise and pulling. When I had about 6" of wire out one end and 6" of empty covering on the other end I stopped pulling (Photo #3). Then I slipped the exposed wire into the empty jacket to make a continuous circle of wire. I taped the joint and the area over the inside joint of wire with electrical tape (Photo #4).
I cut a piece of plastic window screen about 4" bigger than the garbage can lid in each direction. I put the screen in the lid from the inside and secured it in place with the wire retaining ring (Photo #5).