photshop class

So for my self initiated CAS i started a photoshop club, and well i'm having problems i'm trying to get the little kids interested in the club but i don't really have much of an idea what to teach them that would interest them i've spent some time thinking about it and i still really don't know, so i just wanna know what are the things you want to learn in photoshop because then i might be able to figure out what kind of things i need to learn