The original answer "a man", because he crawls as a baby, walks as an adult, and uses a cane as an old man makes it, in my opinion, a very suspect riddle. Seems like pretty loose thinking at best, some philosophers might actually help on that one.

Thought experiment: what if we took other people's intuitions as seriously as our own?

And no, I did not make up that hat. Rumi really did wear a giant painted golden walnut on his head.