I like to cut about 1/2 inch off the top of a carrot, place it in a little bottle cap, or other small container, keep it watered, and it will grow these nice ferny things. Very cheery in the midst of winter!
I also had a few turnips left and so am growing one in a little vase. I keep the vase full of clean water and the top grows. Nice to look at and nice to take a nibble off of once in a while.
I know, I'm kind of strange, but the heart of a gardener is always simmering. In fact, yesterday I ordered some seeds that we need and also drew out our vegetable garden plan. I can't wait!