I just wanted to add,... The gummies for the ears are a great solution but you have to time it right. We still bring chewy candy for my daughter (usually mentos but those are chokables at two) and there's one golden rule for this tactic...
DON'T BUST THEM OUT UNTIL YOU'RE ON THE RUNWAY!!
I mean, I normally don't let my daughter have them until we're speeding down the line about to lift off. The first time we flew when she was a toddler, I brought gummies and gave them to her as we pulled away from the gate. But we sat in the lineup so long that by the time it was our turn to go all the gummies were gone.
Have a great trip!!