Not all powers are super. Sixth-grader Ewan McFleagle does not want to be a superhero. He just wants to go out with the new girl and dig into a heaping slice of pecan pie. (Though not necessarily in that order.) But everything changed when he and his friends touched a magical rock that gave them . . . abilities. Not cool super powers, mind you. No, they got the grossest and most useless powers ever: bad breath, instant-spaghetti-boiling,...