Just wondering... I know you aren't allowed certain things on a plane because they could be a "weapon" , like finger nail clippers. So does anyone know, what about a pencil or a pen? My son asked for a maze book to take with him on a plane and of course it is hard to do a maze without a writing utensil. Also, does anyone know how much liquid you are allowed to bring on or where I can check to find that out? We have a 120 ml bottle of sunscreen I would like to put on our carryon for when we arrive before our luggage gets to the hotel. Is this too big? Thanks in advance.