Food is the best attractant - corn or soybeans will work. You can also cut the bottom out of a plastic peanut butter jar and then nail the lid to a tree and screw the jar back on. That will last a little longer than corn. Apples would also be a good choice.
“There are two spiritual dangers in not owning a farm. One is the danger of supposing that breakfast comes from the grocery, and the other that heat comes from the furnace.”