Just in case you are not clear on what is happening here, Logan is swallowing air and making himself burp. Of course when the camera is rolling they are pretty week but he belched pretty good as soon as I stopped. It is not easy to hide the fact that I was impressed that he could do this so young. I think Katie wasn't good at it until she was in 5th grade! The girls tried a pathetic imitation but it is really just a growl more than a burp.