My wife and I have a 20 month old boy and we might be travelling in few weeks. One thing makes our head spin is our toddler on the plane. We don't want to be one of those travelers who let their kids be annoying little human co-passengers. He used to be a great car rider and had no problem riding on planes, but the last few months he has peaked through the toddler tantrum phase and he doesn't like to be tied down to a place. So any good tips/suggestions on how to get kids to sleep on a plane?