Thanks for this tip! I went on Leaps and Bounds and they sell both the Earplanes (for $6.95 for the pair) and the Ear Ease Pain Reliever (for $14.95 for
one). But obviously you would have to buy 2 of those Ear Ease things for both ears, right?

Water in styrofoam is much much cheaper!

Considering I would have to buy 6 of those things!
I think if I had to, I'd buy the earplanes as I can imagine what a big project it would be to get my 2yo, 3yo, 5yo to hold their styrofoam cups on their ears during take off and landing

Anyway, thanks for all of these fabulous tips! I'm definitely going to use some of them next week when we go!