|Log: about 1 foot long by 2 in. diam.|
It's not difficult at all, and it's incredibly inexpensive! Just slather some peanut butter on a small area of a tree's bark (I use the Crunchy kind - the cheaper the better). You can spread it on a part of an existing tree, or do what I've done: cut a log section and outfit it with an eye-hook, to hang where flowering baskets were last summer .
Sometimes these "spreads" are marketed by some specialty stores. Don't waste your money! Instead, save money by avoiding paying for others' marketing and pointless 'secret ingredients'.