We are taking our 16 month old on a trip to see her grandparents and we have 2 flights each way, including 1 long one (4.5 hrs.) I want to get some small toys to keep her entertained and am looking for suggestions.

LO has her own seat and will be in her carseat. I would prefer to not have obnoxious noise/music that will annoy the passengers around us. Most of the toys she plays with a lot now are big, like an activity table, or have lots of parts, like blocks. What would you bring?