Can you get some of those little boxes of cereal and they can have them dry? Or maybe some cereal bars, but I know they are kinda like granola bars but softer. Maybe dried fruit too. This is so embarassing, we went on a plane a few months back, and my son brought a big bag of cheese puffs in his backpack, and I didn't know it. He was sitting in front of me, with my husband, and next thing i know he stands up with his really messy orange fingers, and asks where's the bathroom I need to wash my hands!! I about died!! I bet you can take cheese puffs!!!! Have fun!!