Humor. Arr arr!

[temporus]

So what's funny to an 18 month old?  Well, actually, a lot is pretty funny to him, as he laughs all the time.  But just recently, he's started to tell his own joke.  It consists of one word.   Potato.  Though he says it more like:  poh-TAAAY-toh, with the pitch and volume rising in the middle of the word.   Now, that's cute.  But more than that, what makes the whole thing funny is how he uses it.

Observe:

Mom: What is this? (holds up a banana)
Son:  Potato. (laughs hysterically)

or

Dad:  What are you eating? (helps child eat some spaghetti)
Son:  Ssspotato.  (laughs)

Now, he can say banana, and he knows what one is.  He also knows what spaghetti is, though as is typical the pronunciation is off.  Best we can tell, it amuses him to intentionally say the wrong word for an object.   In fact, there's a better than 50/50 chance of anything being misidentified as a potato.  Now, as the parents, of course we find what he's doing cute and amusing.  What really gets me is just how funny he thinks it is.  Because he laughs and laughs.