The Mystery Word

Henry's diction is pretty good for a 19-month old.  We understand most of what he says on the first try, or at the very least we can figure it out pretty quickly.  But he has one word that he uses all the time and we have no idea what it means.  Seems to be used to indicate, "Hey, look at that!" but we really have no idea what he's trying to say or what adult phrase he might be trying to copy.

Any guesses what "odacer" is supposed to mean?