MG, my sister is a preschool teacher & each year they end up with lots of presents. Mostly they get chockies or some sort of Christmas-y lollies or biscuits. Her absolute favourites though have been a little glass angel or magnet, keyring etc with a teacher saying on it "my favourite teacher" or "our best teacher". Very simple & pretty cheap, but these are the things she loves & she remembers which child gave her which present even four years later