Let's replace my Kung Fu Failure with this:
Sentinels of the Multiverse
Co-Op superhero card game
4 seats
kid friendly
Rules taught/no xp necessary
Sentinels of the Multiverse is a cooperative game in  which players control heroes with powers and abilities in the form of  cards. Two to five players control three to five heroes who must work  together to defeat the villains and survive the dangerous environments  in which the battles take place.
 Ultimately, either the heroes will successfully defeat the villains  and foil their plans, or the villains will triumph, and the heroes will  be forced to regroup to fight another day.