Let the children take turns in the window seat. As you know, this is the best seat on the plane. Flying through the clouds is very enchanting to a youngster. Have the children take turns sitting next to each parent. This is a great opportunity to spend some quality time with your children.
Some airlines have special meals they can serve to children.
If your child is not up for the cold sandwich that is often passed out, ask the flight attendant if they offer something different for children. A lot of times they do. Praise your child throughout the flight. I know we've been on the plane for a long time. You've been very good and well behaved.