You can grow them as pot plants, the leaves will grow on, but you will not get any fruit unless you go for a very hot hot house, which would make pineapples a very expensive treat! We grew them in our garden in Zambia, they do indeed look unexpected, not at all what we might have imagined before. I have a very old gardening book from 1895, which describes growing them, took several people a great deal of work, lots of horse manure, straw, and an enormous greenhouse, plus several small boys to keep the boiler lit all night! Somehow I don't think we would manage that these days!