A Word of Warning

Do not attempt to train your goldfish in the finer nuances of traditional Japanese origami. It can only end in tears.

UPDATE: It is also inadvisable to teach your wombat to jump the hurdles; they are much too lazy for that.

However, if you wish your carrot to learn Ancient Sumerian Poetry, go right ahead. I know from experience that the time you spend with your carrot will be rich, rewarding, and fulfilling for the soul.