The one above was for a 1st grade boy.
Above is the front of a card I made for a kid in 5th grade who likes Fablehaven and Percy Jackson. I would have done an epic fight scene or a realistic drawing of a mythical creature, but those sorts of things don't really fit as well with my drawing style. Dragon was as close as I could get. Though, maybe next time I will challenge myself a bit more to step outside of my usual look.
Above is the back of the dragon card.