I know all children are different but any advice is appreciated. We're due to fly tomorrow to Majorca with wife + 5&3 YO Sons. Any tips or necessities that I can add to my hand luggage real quick please? We have basics like snacks, possible a new toy just as a surprise. Also invested in some none audio headphones. It's been a few years since I have flown, the oldest was just over 1 year. Thanks in advance