The most ridiculous bribery ever: John Paul ate his entire breakfast because I was willing to spell a new word for every bite he took. "Spehws BOY!" "Okay, I'll spell the word 'boy' when you eat your banana." (shoves banana in mouth) "B-O-Y spells..." "BOY!!!" And so on and so forth until all the breakfast was eaten.
I'm thinking this wouldn't work with most 2-year-olds.