PetTree Cactus

Pets are great to have around, to play with, to talk to, and to love. What's especially nice about this PetTree Cactus is that it doesn't need to be groomed, won't get fleas, and its vet bills will be exceptionally low. When you get it, it'll be just a tiny sprout, but keep it watered by dipping the bottom of its capsule in water once a month (any more and you'll kill it) and it'll grow into a nice, healthy cactus. $10 USD. (Via Treehugger.)