“The Kid Who Would Be King” (** out of four) was a mediocre children’s fantasy adventure about a group of kids (Louis Ashborne Serkis, Tom Taylor, Dean Chaumoo, and others) who find King Arthur’s sword and find they are destined to embark on a quest to thwart a medieval force of evil which threatens destruction to all of England. Some good action scenes and impressive visual effects (love the climactic battle in the school) but film takes too long to get going and then too long to get where it’s going at two hours. Young cast of kids are likeable but this is best left to young kids. Patrick Stewart, who once starred in “Excalibur”, has a small but key role as the wizard Merlin.