You've managed to get your child into their seat, but the most critical part is yet to come.
Staying seated
Takeoff can be either really exciting for your child or a scary experience. However they feel about the plane taking off, you should always ensure that your child is securely fastened in their car seat or aeroplane seat with the provided child safety belt. For older children who might be more fidgety, explain the importance of staying seated and keeping the seatbelt fastened during takeoff and landing.
Earache
Ear discomfort is common in young children during takeoff and landing due to the changes in cabin pressure. To tackle this, you can encourage your child to frequently swallow (especially for older children), offer a pacifier for infants, or have them suck on candy.
Turbulence
Turbulence is normal on flights but it might startle your child. It's a good idea to tell your child that turbulence is a normal part of flying and doesn't mean there's any danger. You can hold your child close or let them hold their favourite stuffed animal for comfort. If your child is scared during turbulence, calmly explain what's happening, or distract them with a favourite book or game.