We usually try and correct the kids when they mispronounce words. There is the odd word however, that never got corrected and the kids just may have even trained the parents to also say it wrong. For instance, for the past 3 or so years we have been calling granola bars "gree-noodle bars" without even really realizing it. I think that is about to change as we have, thanks to Sam, all been made aware of this bad habit.
Sam: Dad, do gree-noodle bars actually have noodles in them?
Jeremy: No.
Sam: But they are called "Gree-NOODLE" bars.
Jeremy: They are actually called "Granola bars", but you couldn't say that when you were little and just started calling them "Gree-noodle bars".
Sam and Jeremy then continued to discuss who was actually pronouncing it correctly... we still have a bit of work to do to convince Sam that he should call them "Granola Bars".