Deep breathing. If your child is impatient, work with them on taking big, deep breaths. It's a great, on-the-go way to focus on emotional regulation.
Give them a busy book. Don't feel like lugging a busy book to your final destination? Quiet book versions like the DeMoca Quiet Book ($50) nix "are-we-there-yets."
Let them play with window clings. Bring stickies-on-the-go. Kids can take them on and off the windows in the car (as long as it's not too distracting to the driver) or on a plane, and again in a hotel room.
Bring sticker books. Sticker books with big stickers, especially ones with beloved characters like Elmo or items like cars, make for a screen-free activity while traveling.
Dry-erase books. Unlike coloring books, you can wipe these books clean and reuse them.
Pack a fidget toy or popper. These toys are especially helpful for kids who get anxious in the car.
Window markers. Let your little one be a rebel with something they can't do at home: draw on car windows with erasable markers, like these Chalkola Liquid Chalk Markers ($26).