Welcome to part 3 of our series on travel tips for families. If you need help deciding on what to bring on board an aircraft to keep your little ones entertained for a flight, then our post about tips for carry-on luggage might be helpful.  We have also put together our packing list for family sun holidays or vacations. Today’s post is a list of tips and tricks we have found useful over the years. Before you go: Check that passports are in date. Check-in online – saves queuing. Keep carry-on luggage to a minimum but well stocked with activities and snacks for the kids (and a change of clothes!).  Our…