We've been trying to teach the E-man different ways to express himself when he gets frustrated. Our current favorite is for him to hold one hand up and say "Aye Carumba!" It hasn't exactly worked yet but it's fun watching him practice "Aye Carumba!"
Also I've been working on laser beam eyes where we squint and then blast each other a la Cyclops.
This is also the point where I wonder if households with moms do these sorts of things.