I saw those ear plugs. I think I've even used them myself a while back - but how do you get a 3 yo to let me put those in his ears? I don't think the motivation of future pain would be strong enough for him to have the discomfort of the ear plugs. He just wouldn't understand about the degree of future pain...

My GP isn't able to see him until the day before the flight! Maybe I'll need to see someone else...