Some other ideas:
If you're a bit crafty, check out this PDF for making a Star Wars-inspired Quiet Book (shown at top) Though the end result is oh-my-goodness cute, it is listed as a "Beginner level" craft so it should be doable for most of us. Or just search "quiet book" on Etsy and you'll find lots of options, including pre-made books if you just want one to grab and go.
I Spy Bags are really fun for even the youngest child to play with as they look for the items listed on the attached card---plus it will keep their hands busy and not touching every button and knob on the plane. We like the design of this Dino Dudes Bag from Emmie's Designs though she has loads of different styles in case you want to get one for each child.
Depending on how responsible your boys are around magnets, I like the looks of this Construction Magnetic Design Set from Mudpuppy. Since the magnets will stick to either the cards or the storage tin, there is less chance of little pieces going everywhere. But this toy is for kids 6+, so it is probably safer to use during the youngest's naptime, and again, only if you are sure your child won't try to put the magnets in his mouth.
Like so many mamas, we are big fans of eeboo and they have loads of easy-to-carry card games, tray puzzles and other toys on the eebo website. Check out the Things That Go Lacing Cards which are great for hand-eye coordination and can be played with again and again.
The Cubebot Wooden Robot Toy is fun (though a little pricey) but you can do lots of cool stuff with him. The age is a bit advanced, so maybe you can help "transform" him and let the boys make up a story of his adventures. Another wonderful option is a set of Tegu blocks which kids can play with for hours, and now come in a travel version with their own carrying case.
Check out our Travel Essentials posts for even more great ideas, as well as this post about flying with toddlers. And good luck!



