This little guy volunteered in our yard, in a spot where cacti won't likely do well. I dug it up and put it in a little pot. Later, a second one appeared in the same spot. It's a spot where birds sit a lot, probably after having eaten some of the countless prickly pear fruit in the area. After awhile the top of this one started to flatten out more. I really like this shape. It'll be fun watching it develop. And it has that little friend to keep it company now, (it's not as far along, it's still a slightly flattened column). Baby cacti are still formidable. The tiny prickles can really sting and get under your skin.