Spring isn't here yet but I'm gonna start an avocado seed. They are free. All you have to go do is go to www.wegmans.com and buy an avocado.
http://www.wegmans.com/prodimg/839/500/081679054839.jpg
avacados
They are far larger than most vegetable seeds.
All you need is a bowl, a seed and some skewers
use the skewers to support the seed so the bottom soaks in water until it sprouts.
I used a clear bowl so I could see what is going on.
after 24 hours not much as happened....