Not sure if it's what you're looking for, but try the klm website. They have a pretty extensive program for inflight fitness and also programs for children. The address is
www.klm.nl (look for "Special passengers" and "Travel&Health").
In my experience most airlines are very good at taking care of families travelling with children. I would suggest you contact your travelagency and see if they can arrange pre-check-in seating arrangements. Otherwise just be at the airport early, and get a good seat for your family.
