Who knows why "bread" is suddenly so important that it warrants being said all the time. Maybe it's because he likes sandwiches?
"What" stems from the following situation:
Elijah - "Dad Dad"
Daddy - "What?"
Elijah - "What!"
"Dide" is Elijah-speak for "Outside". He looks out the back glass door and says "Dide! Dide! Dide!" It would be nice to be able to take him outside more often, but it's really not terribly safe.