When I was growing up I always called them bednight snakes (typo intended). It is a must for my son (and for me for that matter). He (we) usually have dried fruit, his favorite is mango. Sometimes he want a small bit of cheese and bread. Very often we have grapes. Sometimes he also likes warm milk, cold juice or water (but he is in the process of weaning himself so this may not apply to you--I have tea). I usually put the snacks in a cup with a handle and he eats them while reading bedtime stories and generally winding down to sleep. The idea is something not to messy. When I finally figure out he was just like me (bednight snack requirement), he slept a lot better.