Agree with Chipp. I always pack enough for a day or 2 in case I get stranded or my luggage gets lost. formula, nappies, pain relief, teething toy, muslin, comforter (e.g. blankie, dummy, favourite toy), few changes of clothes, couple of kids books. Plus, always take a change of top for yourself as it's not nice to travel in vomit/milk stained tops.