Little did I know that the discount sweet potato that I lazily forgot about would grow into THIS! After seeing little sprouts pop out a month or so ago, I put the sweetie into a bowl filled with an inch or two of water. Roots began to form from the bottom, and ivy-like leaves from the top.
This can be done with all kinds of pits and even root vegetables; avocado pits are especially beautiful. Usually a toothpick holds the pit so that it sets halfway in a cup of water. I didn't even do that much; really these root plants are hearty and WANT to live, and in my experience, they grow readily.